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Kellie L. Mathis, M.D.

  1. Colon and Rectal Surgeon
  2. General Surgeon
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Publications

  1. Khan S, Glasgow A, Hajjar R, Reynolds I, Gleason L, Sanchez E, Perry W, Mathis K, McKenna N. Reevaluating Preoperative Type and Screen: Identifying When It Is Necessary for Elective Colorectal Surgery. Dis Colon Rectum. 2025 Jun 10 Epub 2025 June 10
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  2. Ng JC, Sileo A, Sassun R, Aboelmaaty S, Violante T, Gomaa IA, D'Angelo AL, Rumer KK, Mathis KL, Larson DW. ASO Visual Abstract: Predictors of Pathologic Non-response to Neoadjuvant Approaches in Locally Advanced Rectal Cancer. Ann Surg Oncol. 2025 Jun; 32 (6):4259-4260
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  3. Reynolds IS, Gleason L, Hajjar R, Khan S, Sanchez E, Bews KA, Martinez-Jorge J, Perry WR, Mathis KL, McKenna NP. Perineal wound complications after proctectomy for Crohn's disease: the impact of the omental pedicle flap and predictors of return to the operating room. J Gastrointest Surg. 2025 Jun; 29 (6):102048 Epub 2025 Apr 03
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  4. Ferrari D, Violante T, Sassun R, Sileo A, Novelli M, Perry WR, Mathis KL, Rumer KK, Behm KT, Larson DW. The safety and trends of same-day and short-stay stoma closure: are we really on the verge of a paradigm shift? J Gastrointest Surg. 2025 May 28; 29 (8):102096 [Epub ahead of print]
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  5. Ng JC, Sassun R, Sileo A, Violante T, Brady JT, DeLeon MF, Perry WR, Mathis KL, Dozois EJ, Larson DW. Real-world clinical outcomes of total neoadjuvant therapy followed by total mesorectal excision for locally advanced rectal cancer at a high-volume institution. Eur J Surg Oncol. 2025 May 20; 51 (9):110181 [Epub ahead of print]
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  6. Ng JC, Sileo A, Sassun R, Aboelmaaty S, Violante T, Gomaa IA, D'Angelo AL, Rumer KK, Mathis KL, Larson DW. Predictors of Pathologic Non-response to Neoadjuvant Approaches in Locally Advanced Rectal Cancer. Ann Surg Oncol. 2025 May; 32 (5):3089-3097 Epub 2025 Feb 07
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  7. Garfinkle R, Kyriakopoulos G, Murphy BC, Larson DW, Shawki SF, Merchea A, Mishra N, Mathis KL, Perry W, Behm KT. Correction: Robotic-assisted surgery for locally advanced rectal cancer beyond total mesorectal excision planes: the Mayo Clinic experience. Surg Endosc. 2025 May; 39 (5):3431
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  8. Garfinkle R, Kyriakopoulos G, Murphy BC, Larson DW, Shawki SF, Merchea A, Mishra N, Mathis KL, Perry W, Behm KT. Robotic-assisted surgery for locally advanced rectal cancer beyond total mesorectal excision planes: the Mayo Clinic experience. Surg Endosc. 2025 Apr; 39 (4):2498-2505 Epub 2025 Feb 25
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  9. Sileo A, Sassun R, Ng JC, Aboelmaaty S, Gomaa IA, Mari G, McKenna NP, Rumer KK, Mathis KL, Larson DW. ASO Visual Abstract: Age Matters: Early-Onset Rectal Cancer Exhibits Higher Rates of Pathological Complete Response : A Retrospective Analysis of the Influence of Young Age on Treatment Success in Stage II-III Rectal Cancer. Ann Surg Oncol. 2025 Apr; 32 (4):2320-2321
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  10. Sileo A, Sassun R, Ng JC, Aboelmaaty S, Gomaa IA, Mari G, McKenna NP, Rumer KK, Mathis KL, Larson DW. Age Matters: Early-Onset Rectal Cancer Exhibits Higher Rates of Pathological Complete Response: A Retrospective Analysis of the Influence of Young Age on Treatment Success in Stage II-III Rectal Cancer. Ann Surg Oncol. 2025 Apr; 32 (4):2302-2307 Epub 2025 Jan 09
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  11. Mirande MD, Bews KA, Brady JT, Colibaseanu DT, Shawki SF, Perry WR, Behm KT, Mathis KL, McKenna NP. Does timing of ileostomy closure impact postoperative morbidity? Colorectal Dis. 2025 Apr; 27 (4):e70088
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  12. Dahab T, Stocchi L, Merchea A, Colibaseanu DT, Farraye FA, Mathis KL, Etzioni DA, Bruining DH, Picco MF. Pathologic Rate of Cancer After Surgery for Dysplasia Detected on Chromoendoscopy for Inflammatory Bowel Disease. Crohns Colitis 360. 2025 Apr; 7 (2):otaf032 Epub 2025 June 05
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  13. Reynolds IS, McKenna NP, Mathis KL, Perry WR. International surgical fellowships in the USA: the pathway to success. Ir J Med Sci. 2025 Mar 17 [Epub ahead of print]
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  14. Ng JC, Sassun R, Sileo A, Perry WRG, Mathis KL, Larson DW. Pathological staging predicts survival more accurately than clinical staging in locally advanced rectal cancer following total neoadjuvant therapy. Br J Surg. 2025 Mar 4; 112 (3)
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  15. Sassun R, Sileo A, Mari G, Mathis KL, Dozois EJ, Larson DW. Mutations in codon 13 of KRAS influence local recurrences in stage III rectal cancer. J Gastrointest Surg. 2025 Jan; 29 (1):101874 Epub 2024 Oct 29
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  16. Sassun R, Sileo A, Gomaa IA, Aboelmaaty S, McKenna NP, Rumer KK, Mathis KL, Larson DW. Reducing the positive margins rate for anal melanoma in the modern era: a national propensity score matched study. Updates Surg. 2025 Jan; 77 (1):133-137 Epub 2024 Dec 26
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  17. Rudnicki Y, Calini G, Abdalla S, Colibaseanu D, Larson DW, Mathis KL. Morbid obesity among Crohn's disease patients is on the rise and is associated with a higher rate of surgical complications after ileocolic resection. Colorectal Dis. 2025 Jan; 27 (1):e17286
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  18. Garfinkle R, Bews KA, Perry WRG, Behm KT, Cima RR, Mathis KL, McKenna NP. Postoperative bowel dysfunction in patients with rectal cancer - Does a minimally invasive surgical approach improve outcomes? Eur J Surg Oncol. 2024 Dec; 50 (12):108661 Epub 2024 Sept 03
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  19. Sassun R, Larson DW, Bews KA, Kelley SR, Mathis KL, Habermann EB, McKenna NP. When Is Diversion Indicated After Right-Sided Colon Resections? J Surg Res. 2024 Nov; 303:361-370 Epub 2024 Oct 15
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  20. McKenna NP, Mirande MD, Bews KA, Dozois EJ, Kelley SR, Mathis KL. Does Operating Volume On-Call Vary by Surgeon? Analysis of On-Call Cases in an Academic Colorectal Practice. Am Surg. 2024 Nov; 90 (11):3144-3147 Epub 2024 June 13
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  21. Violante T, Ferrari D, Mathis KL, Behm KT, Shawki SF, Dozois EJ, Cima RR, Larson DW. Navigating Progress: 8-Year Single-Center Experience With Minimally Invasive Proctectomy and IPAA. Dis Colon Rectum. 2024 Nov 1; 67 (11):1437-1442 Epub 2024 Aug 01
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  22. Violante T, Ferrari D, Sassun R, Sileo A, Ng JC, Mathis KL, Cima RR, Dozois EJ, Larson DW. Open vs. laparoscopic vs. robotic pouch excision: unveiling the best approach for optimal outcomes. Tech Coloproctol. 2024 Oct 15; 28 (1):142
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  23. Gill VS, Boddu SP, Abujbarah S, Mathis KL, Merchea A, Brady JT. Secondary amyloidosis in inflammatory bowel disease patients: findings from three tertiary medical centers. Clin J Gastroenterol. 2024 Oct; 17 (5):844-853 Epub 2024 June 16
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  24. Violante T, Ferrari D, Novelli M, Behm KT, Perry WR, Mathis KL, Dozois EJ, Merchea A, Shawki SS, Larson DW. Evaluating the Impact of Robotic IPAA: A Case-Matched Analysis from a High-Volume Center. Ann Surg. 2024 Sep 5 Epub 2024 Sept 05
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  25. Violante T, Ferrari D, Sileo A, Sassun R, Ng JC, Mathis KL, McKenna NP, Rumer KK, Larson DW. Assessing robotic-assisted surgery versus open approach in penetrating Crohn's disease: advantages and outcomes in ileocolic resection. Tech Coloproctol. 2024 Aug 21; 28 (1):112
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  26. Peponis T, Ubl DS, Habermann EB, Abarca Rendon FM, McKenna NP, Ofshteyn A, Mathis KL, Colibaseanu DT, Kelley SR. Trends and Distribution of IPAAs in the United States: Becoming Harder to Find in Colon and Rectal Surgery Residency Training? Dis Colon Rectum. 2024 Aug 1; 67 (8):1040-1047 Epub 2024 May 03
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  27. Ferrari D, Violante T, Day CN, McKenna NP, Mathis KL, Dozois EJ, Larson DW. Unveiling the Hidden Consequences: Initial Impact of COVID-19 on Colorectal Cancer Operation. J Am Coll Surg. 2024 Aug 1; 239 (2):85-97 Epub 2024 July 17
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  28. Violante T, Ferrari D, Mathis KL, D'Angelo AD, Dozois EJ, Merchea A, Larson DW. Robotic-assisted surgery conversion: the sooner, the better? Insights from a single-center study. J Gastrointest Surg. 2024 Jul; 28 (7):1158-1160 Epub 2024 Apr 05
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  29. Morsi S, Linares Bolsegui M, Kobeissi H, Ghozy S, Kallmes DF, Kelley SR, Mathis KL, Dozois EJ, Loftus CG, Bendel EC, Vidal V, Thompson SM. Common design and data elements on rectal artery embolization for treatment of symptomatic internal hemorrhoidal disease: an interactive systematic review of clinical trials. CVIR Endovasc. 2024 May 11; 7 (1):45
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  30. Gomaa I, Aboelmaaty S, Narasimhan AL, Bhatt H, Day CN, Harmsen WS, Rumer KK, Perry WR, Mathis KL, Larson DW. The Impact of Enhanced Recovery on Long-Term Survival in Rectal Cancer. Ann Surg Oncol. 2024 May; 31(5):3233-3241. Epub 2024 Feb 21.
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  31. Ruan X, Fu S, Jia H, Mathis KL, Thiels CA, Wilson PM, Storlie CB, Liu H. Revolutionizing Postoperative Ileus Monitoring: Exploring GRU-D's Real-Time Capabilities and Cross-Hospital Transferability. medRxiv. 2024 Apr 25.
  32. Ferrari D, Violante T, Addison P, Perry WRG, Merchea A, Kelley SR, Mathis KL, Dozois EJ, Larson DW. Robotic resection of presacral tumors. Tech Coloproctol. 2024 Apr 23; 28 (1):49
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  33. McKenna NP, Bews KA, Mirande MD, Abarca Rendon FM, Ofshteyn A, Peponis T, Shawki SF, Kelley SR, Mathis KL. Surgical management of duodenal crohn's disease. Langenbecks Arch Surg. 2024 Apr 19; 409 (1):132
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  34. Violante T, Ferrari D, Gomaa IA, Rumer KK, D'Angelo AD, Behm KT, Shawki SF, Perry WRG, Kelley SR, Mathis KL, Dozois EJ, Cima RR, Larson DW. Evolution of laparoscopic ileal pouch-anal anastomosis: impact of enhanced recovery program, medication changes, and staged approaches on outcomes. J Gastrointest Surg. 2024 Apr; 28(4):501-506. Epub 2024 Jan 23.
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  35. Ferrari D, Violante T, Bhatt H, Gomaa IA, D'Angelo AD, Mathis KL, Larson DW. Effect of previous abdominal surgery on robotic-assisted rectal cancer surgery. J Gastrointest Surg. 2024 Apr; 28(4):513-518. Epub 2024 Jan 23.
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  36. McKenna NP, Bews KA, Behm KT, Mathis KL, Cima RR, Habermann EB. Timing and Location of Venous Thromboembolisms After Surgery for Inflammatory Bowel Disease. J Surg Res. 2024 Apr; 296:563-570 Epub 2024 Feb 09
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  37. Sakata S, Karim SM, Martinez-Jorge J, Larson DW, Mathis KL, Kelley SR, Rose PS, Dozois EJ. Improving R0 Resection Rates With a Posterior-First, 2-Stage Approach for En Bloc Resection of Locally Advanced Primary and Recurrent Anorectal Cancers Involving the Deep Pelvic Sidewall. Dis Colon Rectum. 2024 Jan 1; 67 (1):90-96 Epub 2023 Sept 01
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  38. Emiloju OE, Storandt M, Zemla T, Tran N, Jethwa K, Mahipal A, Mitchell J, Thiels C, Mathis K, McWilliams R, Hubbard J, Sinicrope F, Shi Q, Jin Z. Tumor-Informed Circulating Tumor DNA for Minimal Residual Disease Detection in the Management of Colorectal Cancer. JCO Precis Oncol. 2024 Jan; 8:e2300127
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  39. Bhatt H, Mathis KL. Small Bowel Carcinoma in the Setting of Inflammatory Bowel Disease. Clin Colon Rectal Surg. 2024 Jan; 37 (1):46-52 Epub 2023 Mar 15
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  40. Mirande MD, McKenna NP, Bews KA, Shawki SF, Cima RR, Brady JT, Colibaseanu DT, Mathis KL, Kelley SR. Risk factors for surgical site infections and trends in skin closure technique after diverting loop ileostomy reversal: A multi-institutional analysis. Am J Surg. 2023 Nov; 226 (5):703-708 Epub 2023 Aug 03
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  41. Fiorentini G, Zironda A, Calini G, Abdalla S, Nagorney DM, Warner SG, Smoot RL, Behm KT, Shawki SF, Mathis KL, Vierkant RA, Larson DW, Cleary SP. Minimally invasive vs. open approach to the simultaneous treatment of colorectal tumors with synchronous liver metastasis: a single center, propensity-score matched analysis from Mayo clinic. HPB (Oxford). 2023 Nov; 25 (11):1337-1344 Epub 2023 June 24
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  42. Phillips KE, Aljobeh A, Benammi S, Abdalla S, Calini G, Shawki SF, Larson DW, Mathis KL. Predictors of ileal pouch failure due to fistulas. Br J Surg. 2023 Aug 11; 110 (9):1046-1048
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  43. Abd El Aziz MA, Abdalla S, Calini G, Saeed H, D'Angelo AL, Behm KT, Shawki S, Mathis KL, Larson DW. Robotic Redo Ileocolonic Resection for Crohn's Disease: A Preliminary Report From a Tertiary Care Center. Dis Colon Rectum. 2023 Aug 1; 66 (8):1095-1101 Epub 2022 Nov 21
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  44. Calini G, Abdalla S, Abd El Aziz MA, Benammi S, Merchea A, Behm KT, Mathis KL, Larson DW. Open approach for ileocolic resection in Crohn's disease in the era of minimally invasive surgery: indications and perioperative outcomes in a referral center. Updates Surg. 2023 Aug; 75 (5):1179-1185 Epub 2023 May 06
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  45. Keim AA, Campbell RL, Mullan AF, McElhinny ML, Monas J, Finch AS, Mathis KL, Lindor RA. Stercoral Colitis in the Emergency Department: A Retrospective Review of Presentation, Management, and Outcomes. Ann Emerg Med. 2023 Jul; 82 (1):37-46 Epub 2023 Mar 23
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  46. Calini G, Abdalla S, Aziz MAAE, Behm KT, Shawki SF, Mathis KL, Larson DW. Incisional hernia rates between intracorporeal and extracorporeal anastomosis in minimally invasive ileocolic resection for Crohn's disease. Langenbecks Arch Surg. 2023 Jun 29; 408 (1):251 Epub 2023 June 29
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  47. Jeans EB, Ebner DK, Takiyama H, Qualls K, Cunningham DA, Waddle MR, Jethwa KR, Harmsen WS, Hubbard JM, Dozois EJ, Mathis KL, Tsuji H, Merrell KW, Hallemeier CL, Mahajan A, Yamada S, Foote RL, Haddock MG. Comparing Oncologic Outcomes and Toxicity for Combined Modality Therapy vs. Carbon-Ion Radiotherapy for Previously Irradiated Locally Recurrent Rectal Cancer. Cancers (Basel). 2023 Jun 5; 15 (11) Epub 2023 June 05
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  48. Inoue A, Sheedy SP, Wells ML, Mileto A, Goenka AH, Ehman EC, Yalon M, Murthy NS, Mathis KL, Behm KT, Shawki SF, Bruining DH, Graham RP, Fletcher JG. Rectal cancer pelvic recurrence: imaging patterns and key concepts to guide treatment planning. Abdom Radiol (NY). 2023 Jun; 48 (6):1867-1879 Epub 2023 Feb 04
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  49. Rudnicki Y, Stapleton SM, Batra R, Gan T, Mathis KL, Kelley SR. Perianal Paget's-an aggressive disease. Colorectal Dis. 2023 Jun; 25 (6):1213-1221 Epub 2023 Mar 21
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  50. Bauzon JS, Tran NV, Hebert BR, Mathis KL. Bowel seromuscular flaps used to repair pelvic defects in patients undergoing reoperative surgery. Tech Coloproctol. 2023 May; 27 (5):373-378 Epub 2022 Sept 06
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  51. McKenna NP, Kelley SR, Bews KA, Behm KT, Mathis KL. Surgical Management of Enterovesical Fistula in Crohn's Disease in the Biologic Era. Inflamm Bowel Dis. 2023 Mar 1; 29 (3):480-482
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  52. Liu S, Mathis KL, Graham RP, Kelley SR. Perianal Basal Cell Carcinoma: 35-Year Experience. Dis Colon Rectum. 2023 Feb 1; 66 (2):217-220 Epub 2022 Nov 27
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  53. Ruan X, Fu S, Storlie CB, Mathis KL, Larson DW, Liu H. Real-time risk prediction of colorectal surgery-related post-surgical complications using GRU-D model. J Biomed Inform. 2022 Nov; 135:104202 Epub 2022 Sept 24
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  54. Lightner AL, Mathis KL. Surgery in pregnancy. American Journal of Gastroenterology. 2022 Oct; 117 (10S):53-9
  55. PelvEx Collaborative , Mathis K. Minimum standards of pelvic exenterative practice: PelvEx Collaborative guideline. Br J Surg. 2022 Sep 28 Epub 2022 Sept 28
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  56. Batra R, Rudnicki Y, Stapleton S, Gan T, Mathis KL, Kelley SR. Management of Diverticulitis in Renal Transplant Patients. Am Surg. 2022 Sep 17; 31348221126970 Epub 2022 Sept 17
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  57. Ansell J, Perry , William R G, Mathis KL, Grass F, Yonkus JA, Hallemeier CL, Haddock MG, Graham RP, Merchea A, Colibaseanu DT, Mishra N, Kelley SR, Larson DW, Dozois EJ. Re-resection of Microscopically Positive Margins Found on Intraoperative Frozen Section Analysis Does Not Result in a Survival Benefit in Patients Undergoing Surgery and Intraoperative Radiation Therapy for Locally Recurrent Rectal Cancer. Dis Colon Rectum. 2022 Sep 1; 65 (9):1094-1102 Epub 2021 Dec 27
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  58. Abd El Aziz MA, Grass F, Calini G, Behm KT, D'Angelo AL, Kelley SR, Mathis KL, Larson DW. Oral Antibiotics Bowel Preparation Without Mechanical Preparation for Minimally Invasive Colorectal Surgeries: Current Practice and Future Prospects. Dis Colon Rectum 2022 Sep 1; 65 (9):e897-e906 Epub 2021 Nov 24
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  59. Abd El Aziz MA, Calini G, Abdalla S, Saeed HA, Lovely JK, D'Angelo AD, Behm KT, Mathis KL, Larson DW. Acute social isolation and postoperative surgical outcomes. Lessons learned from COVID-19 pandemic. Minerva Surg. 2022 Aug; 77 (4):348-353
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  60. Abd El Aziz MA, Larson DW, Grass F, D'Angelo AD, Kelley SR, Raffals LE, Mathis KL, Shawki S. Emergent and Urgent Surgery for Ulcerative Colitis in the United States in the Minimally Invasive and Biologic Era. Dis Colon Rectum. 2022 Aug 1; 65 (8):1025-1033 Epub 2022 July 05
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  61. Calini G, Abdalla S, Abd El Aziz MA, Saeed HA, D'Angelo AD, Behm KT, Shawki S, Mathis KL, Larson DW. Intracorporeal versus extracorporeal anastomosis for robotic ileocolic resection in Crohn's disease. J Robot Surg. 2022 Jun; 16 (3):601-609 Epub 2021 July 27
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  62. Abd El Aziz MA, Grass F, Calini G, Lovely JK, Jacob AK, Behm KT, D'Angelo AD, Shawki SF, Mathis KL, Larson DW. Intraoperative Fluid Management a Modifiable Risk Factor for Surgical Quality - Improving Standardized Practice. Ann Surg. 2022 May 1; 275 (5):891-896 Epub 2022 Jan 21
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  63. Abd El Aziz MA, McKenna NP, Jakub JW, Hallemeier CL, Kelley SR, Jin Z, Mathis KL. Rectal cancer with synchronous inguinal lymph node metastasis without distant metastasis. A call for further oncological evaluation. Eur J Surg Oncol. 2022 May; 48 (5):1100-1103 Epub 2021 Dec 20
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  64. Broccard SP, Colibaseanu DT, Behm KT, Mishra N, Davis P, Maimone KL, Mathis KL, Stocchi L, Dozois EJ, Merchea A. Risk of malignancy and outcomes of surgically resected presacral tailgut cysts: A current review of the Mayo Clinic experience. Colorectal Dis. 2022 Apr; 24 (4):422-427 Epub 2022 Jan 06
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  65. Kelley SR, D'Angelo JD, D'Angelo AD, Behm KT, Colibaseanu DT, Merchea A, Mishra N, Dozois EJ, Mathis KL. The Effect of Advanced Practice Providers on ACGME Colon and Rectal Surgery Resident Diagnostic Index Case Volumes. J Surg Educ. 2022 Mar-Apr; 79 (2):426-430 Epub 2021 Oct 23
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  66. PelvEx Collaborative, Mathis K. Contemporary Management of Locally Advanced and Recurrent Rectal Cancer: Views from the PelvEx Collaborative. Cancers (Basel). 2022 Feb 24; 14(5).
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  67. Grass F, Hubner M, Behm KT, Mathis KL, Hahnloser D, Day CN, Harmsen WS, Demartines N, Larson DW. Development and validation of a prediction score for safe outpatient colorectal resections. Surgery. 2022 Feb; 171 (2):336-341 Epub 2021 Sept 06
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  68. Abd El Aziz MA, Grass F, Behm KT, D'Angelo AL, Mathis KL, Dozois EJ, Larson DW. Trends and consequences of surgical conversion in the United States. Surg Endosc. 2022 Jan; 36 (1):82-90 Epub 2021 Jan 06
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  69. Crippa J, Grass F, Dozois EJ, Mathis KL, Merchea A, Colibaseanu DT, Kelley SR, Larson DW. Robotic Surgery for Rectal Cancer Provides Advantageous Outcomes Over Laparoscopic Approach: Results From a Large Retrospective Cohort. Ann Surg. 2021 Dec 1; 274 (6):e1218-e1222
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  70. Perry WRG, Abd El Aziz MA, Duchalais E, Grass F, Behm KT, Mathis KL, Kelley SR. Sexual dysfunction following surgery for rectal cancer: a single-institution experience. Updates Surg. 2021 Dec; 73 (6):2155-2159 Epub 2021 July 08
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  71. D'Angelo AD, D'Angelo JD, Beaty JS, Cleary RK, Hoedema RE, Mathis KL, Dozois EJ, Kelley SR. Virtual interviews - Utilizing technological affordances as a predictor of applicant confidence. Am J Surg. 2021 Dec; 222 (6):1085-1092 Epub 2021 Oct 16
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  72. Abd El Aziz MA, Calini G, Grass F, Behm KT, D' Angelo AL, Shawki S, Mathis KL, Larson DW. Minimally invasive ileal pouch-anal anastomosis for patients with obesity: a propensity score-matched analysis. Langenbecks Arch Surg. 2021 Nov; 406 (7):2419-2424 Epub 2021 May 13
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  73. D'Angelo JD, D'Angelo AD, Mathis KL, Dozois EJ, Kelley SR. Program Director Opinions of Virtual Interviews: Whatever Makes my Partners Happy. J Surg Educ. 2021 Nov-Dec; 78 (6):e12-e18 Epub 2021 May 09
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  74. Hebert BR, McKenna NP, Mathis KL. Colectomy in the Setting of Cytomegalovirus Infection: Non-Restorative Initially. J Gastrointest Surg. 2021 Oct; 25 (10):2684-2685 Epub 2021 Apr 09
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  75. Calini G, Abd El Aziz MA, Abdalla S, Saeed HA, Lovely JK, D'Angelo AD, Behm KT, Colibaseanu DT, Mathis KL, Larson DW. Patient colon and rectal operative outcomes when treated with immune checkpoint inhibitors. Eur J Surg Oncol. 2021 Sep; 47 (9):2436-2440 Epub 2021 Apr 02
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  76. Sakata S, Karim SM, Mathis KL, Kelley SR, Rose PS, Dozois EJ. Posterior-First Two-Stage Approach to En Bloc Resection of Locally Recurrent Rectal Cancer Involving the Pelvic Sidewall. Dis Colon Rectum. 2021 Aug 1; 64 (8):e465-e470
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  77. Abd El Aziz MA, Perry WRG, Grass F, Merchea A, Raffals LE, Mathis KL, Behm KT. The extent of colorectal resection and short-term outcomes in patients with ulcerative colitis. Updates Surg. 2021 Aug; 73 (4):1429-1434 Epub 2021 Mar 30
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  78. D'Angelo JD, Lund S, Busch RA, Tevis S, Mathis KL, Kelley SR, Dozois EJ, D'Angelo AD. Coping with errors in the operating room: Intraoperative strategies, postoperative strategies, and sex differences. Surgery. 2021 Aug; 170 (2):440-445 Epub 2021 Mar 30
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  79. Driedger MR, Yamashita TS, Starlinger P, Mathis KL, Smoot RL, Cleary SP, Nagorney DM. Synchronous resection of colorectal cancer primary and liver metastases: an outcomes analysis. HPB (Oxford). 2021 Aug; 23 (8):1277-1284 Epub 2021 Jan 18
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  80. Abd El Aziz MA, Grass F, Behm KT, D'Angelo AL, Mathis KL, Dozois EJ, Larson DW. How skilled are skilled facilities? Post-discharge complications after colorectal cancer surgery in the U.S. Am J Surg. 2021 Jul; 222 (1):20-26 Epub 2020 Dec 14
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  81. Grass F, Storlie CB, Mathis KL, Bergquist JR, Asai S, Boughey JC, Habermann EB, Etzioni DA, Cima RR. Challenges of Modeling Outcomes for Surgical Infections: A Word of Caution. Surg Infect (Larchmt). 2021 Jun; 22 (5):523-531 Epub 2020 Oct 20
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  82. Mathis KL. Expert Commentary on Adult Intussusception. Dis Colon Rectum 2021 Jun 1; 64 (6):648-649
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  83. PelvEx Collaborative , Mathis K. Induction chemotherapy followed by chemoradiotherapy versus chemoradiotherapy alone as neoadjuvant treatment for locally recurrent rectal cancer: study protocol of a multicentre, open-label, parallel-arms, randomized controlled study (PelvEx II). BJS Open. 2021 May 07; 5(3).
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  84. AlJamal YN, Baloul MS, Mathis KL, Dozois EJ, Kelley SR. Evaluating Non-operative Robotic Skills in Colorectal Surgical Training. J Surg Res. 2021 Apr; 260:391-398 Epub 2020 Nov 28
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  85. White LA, Joseph JP, Yang DY, Kelley SR, Mathis KL, Behm K, Viers BR. Intraureteral indocyanine green augments ureteral identification and avoidance during complex robotic-assisted colorectal surgery. Colorectal Dis. 2021 Mar; 23 (3):718-723 Epub 2020 Nov 05
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  86. Grass F, Merchea A, Mathis KL, Mishra N, Heien H, Sangaralingham LR, Larson DW. Cost drivers of locally advanced rectal cancer treatment-An analysis of a leading healthcare insurer. J Surg Oncol. 2021 Mar; 123 (4):1023-1029 Epub 2021 Jan 26
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  87. Crippa J, Grass F, Achilli P, Behm KT, Mathis KL, Day CN, Harmsen WS, Mari GM, Larson DW. Surgical Approach to Transverse Colon Cancer: Analysis of Current Practice and Oncological Outcomes Using the National Cancer Database. Dis Colon Rectum. 2021 Mar 1; 64 (3):284-292
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  88. Mathis K. Laparoscopic complete mesocolic excision: safe for right colon cancer? Lancet Oncol 2021 Mar; 22 (3):293-294 Epub 2021 Feb 12
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  89. Abd El Aziz MA, Grass F, Behm KT, Shawki S, D'Angelo AL, Mathis KL, Larson DW. Trends of complications and innovative techniques' utilization for colectomies in the United States. Updates Surg. 2021 Feb; 73 (1):101-110 Epub 2020 Aug 09
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  90. Achilli P, Radtke TS, Lovely JK, Behm KT, Mathis KL, Kelley SR, Merchea A, Colibaseanu DT, Larson DW. Preoperative predictive risk to cancer quality in robotic rectal cancer surgery. Eur J Surg Oncol. 2021 Feb; 47 (2):317-322 Epub 2020 Aug 26
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  91. PelvEx Collaborative. Perioperative management and anaesthetic considerations in pelvic exenterations using Delphi methodology: results from the PelvEx Collaborative. BJS Open. 2021 Jan 8; 5 (1)
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  92. Achilli P, Crippa J, Grass F, Mathis KL, D'Angelo AD, Abd El Aziz MA, Day CN, Harmsen WS, Larson DW. Survival impact of adjuvant chemotherapy in patients with stage IIA colon cancer: Analysis of the National Cancer Database. Int J Cancer. 2021 Jan 1; 148 (1):161-169 Epub 2020 Aug 08
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  93. McKenna NP, Bews KA, Colibaseanu DT, Mathis KL, Nelson H, Habermann EB. The intersection of tumor location and combined bowel preparation: Utilization differs but anastomotic leak risk reduction does not. J Surg Oncol. 2021 Jan; 123 (1):261-270 Epub 2020 Oct 01
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  94. Larson DW, Abd El Aziz MA, Perry W, Behm KT, Shawki S, Mandrekar J, Mathis KL, Grass F. Surgical Resection for Crohn's and Cancer: A Comparison of Disease-Specific Risk Factors and Outcomes. Dig Surg. 2021; 38 (2):120-127 Epub 2021 Jan 27
    View PubMed
  95. Yonkus JA, Thiels CA, Skaran P, Mathis KL, Bingener J. The effect of pre-operative diagnosis on patient reported outcomes in patients undergoing colorectal operations: A prospective study. Am J Surg. 2020 Dec; 220 (6):1388-1392 Epub 2020 Aug 27
    View PubMed
  96. Abd El Aziz MA, Perry WR, Grass F, Mathis KL, Larson DW, Mandrekar J, Behm KT. Predicting primary postoperative pulmonary complications in patients undergoing minimally invasive surgery for colorectal cancer. Updates Surg. 2020 Dec; 72 (4):977-983 Epub 2020 Oct 01
    View PubMed
  97. PelvEx Collaborative. Predicting outcomes of pelvic exenteration using machine learning. Colorectal Dis. 2020 Dec; 22(12):1933-1940. Epub 2020 Jul 29.
    View PubMed
  98. Houdek MT, Wellings EP, Moran SL, Bakri K, Dozois EJ, Mathis KL, Yaszemski MJ, Sim FH, Rose PS. Outcome of Sacropelvic Resection and Reconstruction Based on a Novel Classification System. J Bone Joint Surg Am. 2020 Nov 18; 102 (22):1956-1965
    View PubMed
  99. Abd El Aziz MA, Grass F, Perry W, Behm KT, Shawki SF, Larson DW, Mathis KL. Colectomy for patients with super obesity: current practice and surgical morbidity in the United States. Surg Obes Relat Dis. 2020 Nov; 16 (11):1764-1769 Epub 2020 June 29
    View PubMed
  100. PelvEx Collaborative, Mathis K. Simultaneous pelvic exenteration and liver resection for primary rectal cancer with synchronous liver metastases: results from the PelvEx Collaborative. Colorectal Dis. 2020 Oct; 22 (10):1258-1262 Epub 2020 May 12
    View PubMed
  101. PelvEx Collaborative. Management strategies for patients with advanced rectal cancer and liver metastases using modified Delphi methodology: results from the PelvEx Collaborative. Colorectal Dis. 2020 Sep; 22(9):1184-1188. Epub 2020 Mar 02.
    View PubMed
  102. Alsughayer A, Grass F, McKenna NP, Petersen M, Mathis KL, Lightner AL. Does IBD Portend Worse Outcomes in Patients with Rectal Cancer? A Case-Matched Analysis. Dis Colon Rectum. 2020 Sep; 63 (9):1265-1275
    View PubMed
  103. Grass F, Crippa J, Lovely JK, Ansell J, Behm KT, Achilli P, Hubner M, Kelley SR, Mathis KL, Dozois EJ, Larson DW. Readmissions Within 48 Hours of Discharge: Reasons, Risk Factors, and Potential Improvements. Dis Colon Rectum. 2020 Aug; 63 (8):1142-1150
    View PubMed
  104. Grass F, Hubner M, Mathis KL, Hahnloser D, Dozois EJ, Kelley SR, Demartines N, Larson DW. Challenges to accomplish stringent fluid management standards 7 years after enhanced recovery after surgery implementation-The surgeon's perspective. Surgery. 2020 Aug; 168 (2):313-319 Epub 2020 Feb 28
    View PubMed
  105. Kelley SR, Mathis KL, Dozois EJ. Colorectal surgery training and the COVID pandemic. Clin Teach. 2020 Aug; 17 (4):413-414
    View PubMed
  106. Thiels CA, Hanson KT, Mathis KL, Novotny PJ, Truty MJ, Sloan JA, Bingener J. Prospective longitudinal cohort study of patient recovery after major gastrointestinal surgery: is there a difference between minimally invasive and open approaches? Surg Endosc. 2020 Jul; 34 (7):3126-3134 Epub 2019 Oct 04
    View PubMed
  107. Elias AW, Merchea A, Moncrief S, Wise KB, Colibaseanu DT, Dozois EJ, Mathis KL. Recurrence and Long-Term Survival Following Segmental Colectomy for Right-Sided Colon Cancer in 813 Patients: a Single-Institution Study. J Gastrointest Surg. 2020 Jul; 24 (7):1648-1654 Epub 2019 July 03
    View PubMed
  108. McKenna NP, Habermann EB, Larson DW, Kelley SR, Mathis KL. A 25 year experience of perineal hernia repair. Hernia. 2020 Apr; 24 (2):273-278 Epub 2019 May 02
    View PubMed
  109. Grass F, Hubner M, Mathis KL, Hahnloser D, Dozois EJ, Kelley SR, Demartines N, Larson DW. Identification of patients eligible for discharge within 48 h of colorectal resection. Br J Surg. 2020 Apr; 107 (5):546-551 Epub 2020 Jan 07
    View PubMed
  110. Crippa J, Grass F, Achilli P, Mathis KL, Kelley SR, Merchea A, Colibaseanu DT, Larson DW. Risk factors for conversion in laparoscopic and robotic rectal cancer surgery. Br J Surg. 2020 Apr; 107 (5):560-566 Epub 2020 Jan 24
    View PubMed
  111. McKenna NP, Bews KA, Habermann EB, Dozois EJ, Lightner AL, Mathis KL. What Factors Are Associated With the Eventual Need for an Ileostomy After Total Abdominal Colectomy and Ileosigmoid or Ileorectal Anastomosis for Crohn's Colitis in the Biologic Era? Dis Colon Rectum. 2020 Apr; 63 (4):504-513
    View PubMed
  112. Grass F, Behm KT, Duchalais E, Crippa J, Spears GM, Harmsen WS, Hubner M, Mathis KL, Kelley SR, Pemberton JH, Dozois EJ, Larson DW. Impact of delay to surgery on survival in stage I-III colon cancer. Eur J Surg Oncol. 2020 Mar; 46 (3):455-461 Epub 2019 Nov 28
    View PubMed
  113. McKenna NP, Bews KA, Behm KT, Mathis KL, Lightner AL, Habermann EB. Do Patients With Inflammatory Bowel Disease Have a Higher Postoperative Risk of Venous Thromboembolism or Do They Undergo More High-risk Operations? Ann Surg. 2020 Feb; 271 (2):325-331
    View PubMed
  114. Grass F, Lovely JK, Crippa J, Hubner M, Mathis KL, Larson DW. Potential Association Between Perioperative Fluid Management and Occurrence of Postoperative Ileus. Dis Colon Rectum. 2020 Jan; 63 (1):68-74
    View PubMed
  115. Larson DW, Abd El Aziz MA, Perry W, D'Angelo AL, Behm KT, Mathis KL, Grass F. Additional Value of Preoperative Albumin for Surgical Risk Stratification among Colorectal Cancer Patients. Ann Nutr Metab. 2020; 76 (6):422-430 Epub 2021 Mar 15
    View PubMed
  116. Grass F, Ansell J, Petersen M, Mathis KL, Lightner AL. Risk factors for 90-day readmission and return to the operating room following abdominal operations for Crohn's disease. Surgery. 2019 Dec; 166 (6):1068-1075 Epub 2019 Sept 20
    View PubMed
  117. McKenna NP, Lightner AL, Habermann EB, Mathis KL. Hemorrhoidectomy and Excision of Skin Tags in IBD: Harbinger of Doom or Simply a Disease Running Its Course? Dis Colon Rectum. 2019 Dec; 62 (12):1505-1511
    View PubMed
  118. Grass F, Crippa J, Mathis KL, Kelley SR, Larson DW. Feasibility and safety of robotic resection of complicated diverticular disease. Surg Endosc. 2019 Dec; 33 (12):4171-4176 Epub 2019 Mar 13
    View PubMed
  119. Mathis KL, Nelson H. Defining the Rectum. Ann Surg 2019 Dec; 270 (6):960-961
    View PubMed
  120. Nguyen A, James DR, Dozois EJ, Kelley SR, Mathis KL. The Role of Adjuvant Chemotherapy in ypT0N0 Rectal Adenocarcinoma. J Gastrointest Surg. 2019 Nov; 23 (11):2263-2268 Epub 2019 Feb 06
    View PubMed
  121. Grass F, Braafladt S, Alabbad J, Lovely JK, Kelley SR, Mathis KL, Huebner M, Larson DW. The effects of tranexamic acid on blood loss and transfusion rate in colorectal surgery. Am J Surg. 2019 Nov; 218 (5):876-880 Epub 2019 Mar 15
    View PubMed
  122. PelvExCollaborative, Mathis K. Pelvic Exenteration for Advanced Nonrectal Pelvic Malignancy. Ann Surg. 2019 Nov; 270 (5):899-905
    View PubMed
  123. Grass F, Fletcher JG, Alsughayer A, Petersen M, Bruining DH, Bartlett DJ, Mathis KL, Lightner AL. Development of an Objective Model to Define Near-Term Risk of Ileocecal Resection in Patients with Terminal Ileal Crohn Disease. Inflamm Bowel Dis. 2019 Oct 18; 25 (11):1845-1853
    View PubMed
  124. McKenna NP, Habermann EB, Zielinski MD, Lightner AL, Mathis KL. Body mass index: Implications on disease severity and postoperative complications in patients with Crohn's disease undergoing abdominal surgery. Surgery. 2019 Oct; 166 (4):703-708 Epub 2019 June 28
    View PubMed
  125. PelvEx Collaborative, Mathis K. Palliative pelvic exenteration: A systematic review of patient-centered outcomes. Eur J Surg Oncol. 2019 Oct; 45 (10):1787-1795 Epub 2019 June 14
    View PubMed
  126. Quinn KP, Prothero BL, Russell JM, Hegge RJ, von AG, Larson PA, Christofferson SN, Smyrk TC, Mathis KL, Goenka AH, Sheedy SP, Bruining DH, Fletcher JG, Loftus EV, Raffals LE. Impact of multidisciplinary eBoard on the management of patients with complex inflammatory bowel disease. Crohn's & Colitis 360. 2019; 1(2):otz013.
  127. PelvEx Collaborative, Mathis K. Changing outcomes following pelvic exenteration for locally advanced and recurrent rectal cancer. BJS Open. 2019 Aug; 3(4):516-520. Epub 2019 Mar 06.
    View PubMed
  128. Shariq OA, Hanson KT, McKenna NP, Kelley SR, Dozois EJ, Lightner AL, Mathis KL, Habermann EB. Does Metabolic Syndrome Increase the Risk of Postoperative Complications in Patients Undergoing Colorectal Cancer Surgery? Dis Colon Rectum. 2019 Jul; 62 (7):849-858
    View PubMed
  129. McKenna NP, Bews KA, Mathis KL, Lightner AL, Habermann EB. Surgery During Admission for an Ulcerative Colitis Flare: Should Pouch Formation Be Considered? J Surg Res. 2019 Jul; 239:216-223 Epub 2019 Mar 07
    View PubMed
  130. Deidda S, Crippa J, Duchalais E, Kelley SR, Mathis KL, Dozois EJ, Larson DW. Hybrid minimally invasive/open approach versus total minimally invasive approach for rectal cancer resection: short- and long-term results. Int J Colorectal Dis. 2019 Jul; 34 (7):1251-1258 Epub 2019 May 28
    View PubMed
  131. Kelley SR, Colibaseanu DT, Mathis KL, Lightner AL, Merchea A, Larson DW, Mishra N, Dozois EJ. Factors Influencing Colon and Rectal Surgery Residency Program Selection. J Surg Res. 2019 Jun; 238:137-143 Epub 2019 Feb 13
    View PubMed
  132. Scow JS, Mathis KL. Gastrointestinal stromal tumors (GIST) of the anus: A single institution experience. Turk J Gastroenterol 2019 Jun; 30 (6):576-577
    View PubMed
  133. Dozois EJ, Lightner AL, Mathis KL, Chua HK, Kelley SR, Fletcher JG, Dietz AB, Friton JJ, Butler GW, Faubion WA. Early Results of a Phase I Trial Using an Adipose-Derived Mesenchymal Stem Cell-Coated Fistula Plug for the Treatment of Transsphincteric Cryptoglandular Fistulas. Dis Colon Rectum. 2019 May; 62 (5):615-622
    View PubMed
  134. Grass F, Spindler BA, Naik ND, Thiels CA, Dozois EJ, Larson DW, Mathis KL. Oncological outcome of peripartum colorectal carcinoma-a single-center experience. Int J Colorectal Dis. 2019 May; 34 (5):899-904 Epub 2019 Mar 26
    View PubMed
  135. Grass F, Lovely JK, Crippa J, Mathis KL, Hubner M, Larson DW. Early Acute Kidney Injury Within an Established Enhanced Recovery Pathway: Uncommon and Transitory. World J Surg. 2019 May; 43 (5):1207-1215
    View PubMed
  136. Mathis KL, Nelson H. Laparoscopic Proctectomy for Cancer. Ann Surg 2019 Apr; 269 (4):603-604
    View PubMed
  137. McKenna NP, Bergquist JR, Habermann EB, Chua HK, Kelley SR, Mathis KL. Surgery and chemotherapy are associated with improved overall survival in anal adenocarcinoma: results of a national cohort study. Int J Colorectal Dis. 2019 Apr; 34 (4):607-612 Epub 2019 Jan 11
    View PubMed
  138. Grass F, Lovely JK, Crippa J, Ansell J, Hubner M, Mathis KL, Larson DW. Comparison of recovery and outcome after left and right colectomy. Colorectal Dis. 2019 Apr; 21 (4):481-486 Epub 2019 Jan 18
    View PubMed
  139. Shahjehan F, Kasi PM, Habermann E, Day CN, Colibaseanu DT, Mathis KL, Larson DW, Merchea A. Trends and outcomes of sphincter-preserving surgery for rectal cancer: a national cancer database study. Int J Colorectal Dis. 2019 Feb; 34 (2):239-245 Epub 2018 Oct 02
    View PubMed
  140. Duchalais E, Larson DW, Machairas N, Mathis KL, Dozois EJ, Kelley SR. Outcomes of Early Removal of Urinary Catheter Following Rectal Resection for Cancer. Ann Surg Oncol. 2019 Jan; 26 (1):79-85 Epub 2018 Oct 23
    View PubMed
  141. McKenna NP, Potter DD, Bews KA, Glasgow AE, Mathis KL, Habermann EB. Ileal-pouch anal anastomosis in pediatric NSQIP: Does a laparoscopic approach reduce complications and length of stay? J Pediatr Surg. 2019 Jan; 54 (1):112-117 Epub 2018 Oct 05
    View PubMed
  142. Duchalais E, Machairas N, Kelley SR, Landmann RG, Merchea A, Colibaseanu DT, Mathis KL, Dozois EJ, Larson DW. Does obesity impact postoperative outcomes following robotic-assisted surgery for rectal cancer? Surg Endosc. 2018 Dec; 32 (12):4886-4892 Epub 2018 July 09
    View PubMed
  143. Grass F, Hubner M, Lovely JK, Crippa J, Mathis KL, Larson DW. Ordering a Normal Diet at the End of Surgery-Justified or Overhasty? Nutrients. 2018 Nov 14; 10 (11)
    View PubMed
  144. Duchalais E, Glyn Mullaney T, Spears GM, Kelley SR, Mathis K, Harmsen WS, Larson DW. Prognostic value of pathological node status after neoadjuvant radiotherapy for rectal cancer. Br J Surg. 2018 Oct; 105 (11):1501-1509 Epub 2018 Apr 17
    View PubMed
  145. Colibaseanu DT, Osagiede O, Spaulding AC, Frank RD, Merchea A, Mathis KL, Parker AS, Ailawadhi S. The Determinants of Palliative Care Use in Patients With Colorectal Cancer: A National Study. Am J Hosp Palliat Care. 2018 Oct; 35 (10):1295-1303 Epub 2018 Mar 26
    View PubMed
  146. Danelich IM, Bergquist JR, Bergquist WJ, Osborn JL, Wright SS, Tefft BJ, Sturm AW, Langworthy DR, Mandrekar J, Devine RM, Kelley SR, Mathis KL, Pemberton JH, Jacob AK, Larson DW. Early Diuresis After Colon and Rectal Surgery Does Not Reduce Length of Hospital Stay: Results of a Randomized Trial. Dis Colon Rectum. 2018 Oct; 61 (10):1187-1195
    View PubMed
  147. McKenna NP, Habermann EB, Glasgow AE, Mathis KL, Lightner AL. Risk factors for readmission following ileal pouch-Anal anastomosis: an American College of Surgeons National Surgical Quality Improvement Program analysis. J Surg Res. 2018 Sep; 229:324-331 Epub 2018 May 10
    View PubMed
  148. Duchalais E, Machairas N, Kelley SR, Landmann RG, Merchea A, Colibaseanu DT, Mathis KL, Dozois EJ, Larson DW. Does prolonged operative time impact postoperative morbidity in patients undergoing robotic-assisted rectal resection for cancer? Surg Endosc. 2018 Aug; 32 (8):3659-3666 Epub 2018 Mar 15
    View PubMed
  149. Lightner AL, Shogan BD, Mathis KL, Larson DW, Duchalais E, Pemberton JH, Dozois EJ. Revisional and Reconstructive Surgery for Failing IPAA is Associated with Good Function and Pouch Salvage in Highly Selected Patients. Dis Colon Rectum. 2018 Aug; 61 (8):920-930
    View PubMed
  150. McKenna NP, Mathis KL, Pemberton JH, Lightner AL. The Impact of Age at Time of Ileal Pouch Anal Anastomosis on Short and Long-Term Outcomes in Adults. Inflamm Bowel Dis. 2018 Jul 12; 24 (8):1857-1865
    View PubMed
  151. PelvEx Collaborative. Factors affecting outcomes following pelvic exenteration for locally recurrent rectal cancer. Br J Surg. 2018 May; 105(6):650-657. Epub 2018 Mar 12.
    View PubMed
  152. Lightner AL, McKenna NP, Tse CS, Hyman N, Smith R, Ovsepyan G, Fleshner P, Crowell K, Koltun W, Ferrante M, D'Hoore A, Lauwers N, Verstockt B, Spinelli A, DiCandido F, Raffals LE, Mathis KL, Loftus EV Jr. Postoperative Outcomes in Ustekinumab-Treated Patients Undergoing Abdominal Operations for Crohn's Disease. J Crohns Colitis. 2018 Mar 28; 12 (4):402-407
    View PubMed
  153. Lightner AL, Mathis KL, Tse CS, Pemberton JH, Shen B, Kochhar G, Singh A, Dulai PS, Eisenstein S, Sandborn WJ, Parry L, Stringfield S, Hudesman D, Remzi F, Loftus EV Jr. Postoperative Outcomes in Vedolizumab-Treated Patients Undergoing Major Abdominal Operations for Inflammatory Bowel Disease: Retrospective Multicenter Cohort Study. Inflamm Bowel Dis. 2018 Mar 19; 24 (4):871-876
    View PubMed
  154. Collins D, Machairas N, Duchalais E, Landmann RG, Merchea A, Colibaseanu DT, Kelley SR, Mathis KL, Dozois EJ, Larson DW. Participation of Colon and Rectal Fellows in Robotic Rectal Cancer Surgery: Effect on Surgical Outcomes. J Surg Educ. 2018 Mar - Apr; 75 (2):465-470 Epub 2017 July 15
    View PubMed
  155. Lightner AL, McKenna NP, Tse CS, Raffals LE, Loftus EV Jr, Mathis KL. Postoperative outcomes in vedolizumab-treated Crohn's disease patients undergoing major abdominal operations. Aliment Pharmacol Ther. 2018 Mar; 47 (5):573-580 Epub 2017 Dec 18
    View PubMed
  156. Grass F, Mathis K. Novelties in treatment of locally advanced rectal cancer. F1000Res. 2018; 7 Epub 2018 Nov 29
    View PubMed
  157. Merchea A, Lovely JK, Jacob AK, Colibaseanu DT, Kelley SR, Mathis KL, Spears GM, Huebner M, Larson DW. Efficacy and Outcomes of Intrathecal Analgesia as Part of an Enhanced Recovery Pathway in Colon and Rectal Surgical Patients. Surg Res Pract. 2018; 2018:8174579 Epub 2018 Mar 01
    View PubMed
  158. AlJamal YN, Mathis K, Dozois E. Risk free simulated environment for assessing the colorectal fellows technical skills Austin Journal of Surgery. 2017 Dec; 4 (5):1118
  159. Parker ME, Mathis KL, Kelley SR. Severity of diverticulitis in patients with polycystic kidney disease without transplantation. Int J Colorectal Dis. 2017 Dec; 32 (12):1767-1770 Epub 2017 Sept 30
    View PubMed
  160. McKenna NP, Mathis KL, Khasawneh MA, Dozois EJ, Larson DW, Pemberton JH, Lightner AL. Obese Patients Undergoing Ileal Pouch-Anal Anastomosis: Short-and Long-term Surgical Outcomes. Inflamm Bowel Dis. 2017 Dec; 23 (12):2142-2146
    View PubMed
  161. Lightner AL, McKenna NP, Moncrief S, Pemberton JH, Raffals LE, Mathis KL. Surgical Outcomes in Vedolizumab-Treated Patients with Ulcerative Colitis. Inflamm Bowel Dis. 2017 Dec; 23 (12):2197-2201
    View PubMed
  162. Lightner AL, Fletcher JG, Pemberton JH, Mathis KL, Raffals LE, Smyrk T. Crohn's Disease of the Pouch: A True Diagnosis or an Oversubscribed Diagnosis of Exclusion? Dis Colon Rectum. 2017 Nov; 60 (11):1201-1208
    View PubMed
  163. McKenna NP, Mathis KL, Khasawneh M, Shariq O, Dozois EJ, Larson DW, Lightner AL. Thirty-Day Hospital Readmission After Restorative Proctocolectomy and Ileal Pouch Anal Anastomosis for Chronic Ulcerative Colitis at a High-Volume Center. J Gastrointest Surg. 2017 Nov; 21 (11):1859-1864 Epub 2017 Aug 24
    View PubMed
  164. Lightner AL, Dattani S, Dozois EJ, Moncrief SB, Pemberton JH, Mathis KL. Pouch excision: indications and outcomes. Colorectal Dis. 2017 Oct; 19 (10):912-916
    View PubMed
  165. Baek SJ, Lightner AL, Boostrom SY, Mathis KL, Cima RR, Pemberton JH, Larson DW, Dozois EJ. Functional Outcomes Following Laparoscopic Ileal Pouch-Anal Anastomosis in Patients with Chronic Ulcerative Colitis: Long-Term Follow-up of a Case-Matched Study. J Gastrointest Surg. 2017 Aug; 21 (8):1304-1308 Epub 2017 May 03
    View PubMed
  166. McKenna NP, Behm KT, Ubl DS, Glasgow AE, Mathis KL, Pemberton JH, Habermann EB, Cima RR. Analysis of Postoperative Venous Thromboembolism in Patients With Chronic Ulcerative Colitis: Is It the Disease or the Operation? Dis Colon Rectum. 2017 Jul; 60 (7):714-722
    View PubMed
  167. Spindler BA, Bergquist JR, Thiels CA, Habermann EB, Kelley SR, Larson DW, Mathis KL. Incorporation of CEA Improves Risk Stratification in Stage II Colon Cancer. J Gastrointest Surg. 2017 May; 21 (5):770-777 Epub 2017 Mar 13
    View PubMed
  168. Lightner AL, Moncrief SB, Smyrk TC, Pemberton JH, Haddock MG, Larson DW, Dozois EJ, Mathis KL. Long-standing Crohn's disease and its implication on anal squamous cell cancer management. Int J Colorectal Dis. 2017 May; 32 (5):661-666 Epub 2017 Mar 14
    View PubMed
  169. Lightner AL, Mathis KL, Dozois EJ, Hahnsloser D, Loftus EV Jr, Raffals LE, Pemberton JH. Results at Up to 30 Years After Ileal Pouch-Anal Anastomosis for Chronic Ulcerative Colitis. Inflamm Bowel Dis. 2017 May; 23 (5):781-790
    View PubMed
  170. Lightner Amy, Pemberton John, Dozois Eric, Larson David, Cima Robert, Mathis Kellie, Pardi Darrell. In Brief Current Problems in Surgery. 2017; 54(4):163-6.
  171. Lightner AL, Pemberton JH, Dozois EJ, Larson DW, Cima RR, Mathis KL, Pardi DS, Andrew RE, Koltun WA, Sagar P, Hahnloser D. The surgical management of inflammatory bowel disease. Curr Probl Surg. 2017 Apr; 54 (4):172-250 Epub 2017 Feb 21
    View PubMed
  172. Thiels CA, Bergquist JR, Krajewski AC, Lee HE, Nelson H, Mathis KL, Habermann EB, Cima RR. Outcomes of Primary Colorectal Sarcoma: A National Cancer Data Base (NCDB) Review. J Gastrointest Surg. 2017 Mar; 21 (3):560-568 Epub 2017 Jan 17
    View PubMed
  173. Lightner AL, Raffals LE, Mathis KL, Cima RR, Tse CS, Pemberton JH, Dozois EJ, Loftus EV. Postoperative Outcomes in Vedolizumab-Treated Patients Undergoing Abdominal Operations for Inflammatory Bowel Disease. J Crohns Colitis. 2017 Feb; 11 (2):185-190 Epub 2016 Aug 19
    View PubMed
  174. Bergquist JR, Thiels CA, Spindler BA, Shubert CR, Hayman AV, Kelley SR, Larson DW, Habermann EB, Pemberton JH, Mathis KL. Benefit of Postresection Adjuvant Chemotherapy for Stage III Colon Cancer in Octogenarians: Analysis of the National Cancer Database. Dis Colon Rectum. 2016 Dec; 59 (12):1142-1149
    View PubMed
  175. Khasawneh MA, McKenna NP, Abdelsattar ZM, Johnson A, Dozois EJ, Pemberton JH, Mathis KL. Impact of BMI on Ability to Successfully Create an IPAA. Dis Colon Rectum. 2016 Nov; 59 (11):1034-1038
    View PubMed
  176. Thiels CA, Hanson KT, Yost KJ, Mathis KL, Cima RR, Zielinski MD, Habermann EB. Achieving a 5-star rating: Analysis of Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) scores among patients undergoing elective colorectal operations. Surgery. 2016 Oct; 160 (4):902-914 Epub 2016 July 27
    View PubMed
  177. Thiels CA, Naik ND, Bergquist JR, Spindler BA, Habermann EB, Kelley SR, Wolff BG, Mathis KL. Survival following synchronous colon cancer resection. J Surg Oncol. 2016 Jul; 114: (1)80-5.
    View PubMed
  178. Thiels CA, Shenoy CC, Ubl DS, Habermann EB, Kelley SR, Mathis KL. Rates, trends, and short-term outcomes of colorectal resections for endometriosis: An ACS-NSQIP review. Int J Surg. 2016 Jul; 31:5-9 Epub 2016 May 20
    View PubMed
  179. Baek SJ, Dozois EJ, Mathis KL, Lightner AL, Boostrom SY, Cima RR, Pemberton JH, Larson DW. Safety, feasibility, and short-term outcomes in 588 patients undergoing minimally invasive ileal pouch-anal anastomosis: a single-institution experience. Tech Coloproctol. 2016 Jun; 20 (6):369-374 Epub 2016 Apr 27
    View PubMed
  180. Martinez Ugarte ML, Lightner AL, Colibaseanu D, Khanna S, Pardi DS, Dozois EJ, Mathis KL. Clostridium difficile infection after restorative proctocolectomy and ileal pouch anal anastomosis for ulcerative colitis. Colorectal Dis. 2016 May; 18 (5):O154-7
    View PubMed
  181. Bergquist JR, Thiels CA, Shubert CR, Habermann EB, Hayman AV, Zielinski MD, Mathis KL. Is Chemotherapy or Radiation Therapy in Addition to Surgery Beneficial for Locally Advanced Rectal Cancer in the Elderly? A National Cancer Data Base (NCDB) Study. World J Surg. 2016 Feb; 40 (2):447-55
    View PubMed
  182. Thiels CA, Bergquist JR, Meyers AJ, Johnson CL, Behm KT, Hayman AV, Habermann EB, Larson DW, Mathis KL. Outcomes with multimodal therapy for elderly patients with rectal cancer. Br J Surg. 2016 Jan; 103: (2)e106-14.
    View PubMed
  183. Singh S, Ding NS, Mathis KL, Dulai PS, Farrell AM, Pemberton JH, Hart AL, Sandborn WJ, Loftus EV Jr. Systematic review with meta-analysis: faecal diversion for management of perianal Crohn's disease. Aliment Pharmacol Ther. 2015 Oct; 42 (7):783-92 Epub 2015 Aug 11
    View PubMed
  184. Bikhchandani J, Ong GK, Dozois EJ, Mathis KL. Outcomes of salvage surgery for cure in patients with locally recurrent disease after local excision of rectal cancer. Dis Colon Rectum. 2015 Mar; 58 (3):283-7
    View PubMed
  185. Mathis KL, Pemberton JH. New developments in colorectal surgery. Curr Opin Gastroenterol. 2015 Jan; 31(1):62-8.
    View PubMed
  186. Imam MH, Eaton JE, Puckett JS, Loftus EV Jr, Mathis KL, Gossard AA, Talwalkar JA, Lindor KD. Neoplasia in the ileoanal pouch following colectomy in patients with ulcerative colitis and primary sclerosing cholangitis. J Crohns Colitis. 2014 Oct; 8: (10)1294-9.
    View PubMed
  187. Colibaseanu DT, Dozois EJ, Mathis KL, Rose PS, Ugarte ML, Abdelsattar ZM, Williams MD, Larson DW. Extended sacropelvic resection for locally recurrent rectal cancer: can it be done safely and with good oncologic outcomes? Dis Colon Rectum. 2014 Jan; 57 (1):47-55
    View PubMed
  188. Mathis KL, Nelson H. Controversies in laparoscopy for colon and rectal cancer. Surg Oncol Clin N Am. 2014 Jan; 23 (1):35-47 Epub 2013 Oct 23
    View PubMed
  189. Mathis KL, Cima RR. Quality assurance in colon and rectal cancer surgery. Surg Oncol Clin N Am. 2014 Jan; 23(1):11-23. Epub 2013 Oct 26.
    View PubMed
  190. Boostrom SY, Mathis KL, Pendlimari R, Cima RR, Larson DW, Dozois EJ. Risk of neoplastic change in ileal pouches in familial adenomatous polyposis. J Gastrointest Surg. 2013 Oct; 17 (10):1804-8 Epub 2013 Aug 15
    View PubMed
  191. Abdelsattar ZM, Mathis KL, Colibaseanu DT, Merchea A, Bower TC, Larson DW, Dozois EJ. Surgery for locally advanced recurrent colorectal cancer involving the aortoiliac axis: can we achieve R0 resection and long-term survival? Dis Colon Rectum. 2013 Jun; 56: (6)711-6.
    View PubMed
  192. Colibaseanu DT, Mathis KL, Abdelsattar ZM, Larson DW, Haddock MG, Dozois EJ. Is curative resection and long-term survival possible for locally re-recurrent colorectal cancer in the pelvis? Dis Colon Rectum. 2013 Jan; 56 (1):14-9
    View PubMed
  193. Mathis KL, Boostrom SY, Pemberton JH. New developments in colorectal surgery. Curr Opin Gastroenterol. 2013 Jan; 29(1):72-8.
    View PubMed
  194. Mathis KL, Green EM, Sargent DJ, Delaney C, Simmang CL, Nelson H. Surgical quality surrogates do not predict colon cancer survival in the setting of technical credentialing: a report from the prospective COST trial. Ann Surg. 2013 Jan; 257 (1):102-7
    View PubMed
  195. Mathis KL, Nelson H. Randomized controlled trials in surgical oncology: where do we stand? Surg Oncol Clin N Am. 2012 Jul; 21(3):449-66, ix. Epub 2012 Apr 17.
    View PubMed
  196. Mathis KL, Larson DW, Dozois , EJ, Cima , RR, Huebner , M, Haddock , MG, Wolff , BG, Nelson , H, Pemberton , JH. Authors' Reply: Outcomes Following Surgery Without Radiotherapy for Rectal Cancer Br J Surg.2012;99:(6)879.
  197. Boostrom SY, Mathis KL, Pemberton JH. Laparoscopic versus open surgery in Crohn's disease. Inflammatory Bowel Disease Monitor. 2012; 13(2):43-50.
  198. Mathis KL, Larson DW, Dozois EJ, Cima RR, Huebner M, Haddock MG, Wolff BG, Nelson H, Pemberton JH. Outcomes following surgery without radiotherapy for rectal cancer. Br J Surg. 2012 Jan; 99(1):137-43 Epub 2011 Nov 3.
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  199. Mathis KL, Benavente-Chenhalls LA, Dozois EJ, Wolff BG, Larson DW. Short- and long-term surgical outcomes in patients undergoing proctocolectomy with ileal pouch-anal anastomosis in the setting of primary sclerosing cholangitis. Dis Colon Rectum. 2011 Jul; 54 (7):787-92
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  200. Levitt MA, Mathis KL, Pemberton JH. Surgical treatment for constipation in children and adults. Best Pract Res Clin Gastroenterol. 2011 Feb; 25(1):167-79.
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  201. Mathis KL, Cima RR, Pemberton JH. New developments in colorectal surgery. Curr Opin Gastroenterol. 2011 Jan; 27(1):48-53.
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  202. Mathis KL, Dozois EJ, Grewal MS, Metzger P, Larson DW, Devine RM. Malignant risk and surgical outcomes of presacral tailgut cysts. Br J Surg. 2010 Apr; 97(4):575-9.
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  203. Mathis KL, Hoskin TL, Boughey JC, Crownhart BS, Brandt KR, Vachon CM, Grant CS, Degnim AC. Palpable presentation of breast cancer persists in the era of screening mammography. J Am Coll Surg. 2010 Mar; 210: (3)314-8.
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  204. Reid-Lombardo KM, Mathis KL, Wood CM, Harmsen WS, Sarr MG. Frequency of extrapancreatic neoplasms in intraductal papillary mucinous neoplasm of the pancreas: implications for management. Ann Surg. 2010 Jan; 251(1):64-9.
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  205. Mathis KL, Dozois EJ, Larson DW, Cima RR, Wolff BG, Pemberton JH. Outcomes in patients with ulcerative colitis undergoing partial or complete reconstructive surgery for failing ileal pouch-anal anastomosis. Ann Surg. 2009 Mar; 249 (3):409-13
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  206. Mathis KL, Nelson H, Pemberton JH. Can unresectable colorectal cancer be cured? Adv Surg. 2009; 43:211-9
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  207. Mathis KL, Nelson H, Pemberton JH, Haddock MG, Gunderson LL. Unresectable colorectal cancer can be cured with multimodality therapy. Ann Surg. 2008 Oct; 248 (4):592-8
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  208. Rohrer AJ, Porterfield JR Jr, Grinberg GG, Mathis KL, Farley DR. Acute epigastric pain with an obscure origin. Contemp Surg. 2008 Jul; 64(7):321-4.
  209. Mathis KL, Dozois EJ, Larson DW, Cima RR, Sarmeinto JM, Wolff BG, Heimbach JK, Pemberton JH. Ileal pouch-anal anastomosis, liver transplantation for ulcerative colitis complicated by primary sclerosing cholangitis. Br J Surg. 2008 May 21.
  210. Benavente-Chenhalls L, Mathis KL, Dozois EJ, Cima RR, Pemberton JH, Larson DW. Laparoscopic ileal pouch-anal anastomosis in patients with chronic ulcerative colitis and primary sclerosing cholangitis: a case-matched study. Dis Colon Rectum. 2008 May; 51(5):549-53. Epub 2008 Mar 04.
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  211. Mathis KL, Wiegmann DA. Construct validation of a laparoscopic surgical simulator. Simul Healthc. 2007 Fall; 2 (3):178-82
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  212. Mathis KL, Farley DR. Operative management of symptomatic duodenal diverticula. Am J Surg. 2007 Mar; 193(3):305-8; discussion 308-9.
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  213. Podgaetz E, Mathis KL, Farley DR. Imaging in Breast Cancer Detection: Mammography, Ultrasound, MRI and PET: Friends or Foes? Contemporary Surgery. 2006; 62(8):365-8.
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