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  1. C. difficile
  2. C. difficile colitis (See: Pseudomembranous colitis)
  3. Calciphylaxis
  4. Calluses and corns (See: Corns and calluses)
  5. Cancer
  6. Cancer of the ureter
  7. Cancer, acute lymphocytic leukemia (See: Acute lymphocytic leukemia)
  8. Cancer, acute myelogenous leukemia (See: Acute myelogenous leukemia (AML))
  9. Cancer, anal (See: Anal cancer)
  10. Cancer, basal cell (See: Basal cell carcinoma)
  11. Cancer, bile duct (See: Gallbladder cancer)
  12. Cancer, bladder (See: Bladder cancer)
  13. Cancer, bone (See: Bone cancer)
  14. Cancer, breast (See: Breast cancer)
  15. Cancer, carcinoid tumors (See: Carcinoid tumors)
  16. Cancer, cervical (See: Cervical cancer)
  17. Cancer, chronic lymphocytic leukemia (See: Chronic lymphocytic leukemia)
  18. Cancer, chronic myelogenous leukemia (See: Chronic myelogenous leukemia)
  19. Cancer, colon (See: Colon cancer)
  20. Cancer, endometrial (See: Endometrial cancer)
  21. Cancer, esophageal (See: Esophageal cancer)
  22. Cancer, eye melanoma (See: Eye melanoma)
  23. Cancer, gallbladder (See: Gallbladder cancer)
  24. Cancer, gastric (See: Stomach cancer)
  25. Cancer, hairy cell leukemia (See: Hairy cell leukemia)
  26. Cancer, Hodgkin's disease (See: Hodgkin's lymphoma)
  27. Cancer, Hurthle cell (See: Hurthle cell cancer)
  28. Cancer, hypopharyngeal (See: Throat cancer)
  29. Cancer, inflammatory breast (See: Inflammatory breast cancer)
  30. Cancer, kidney (See: Kidney cancer)
  31. Cancer, laryngeal (See: Throat cancer)
  32. Cancer, leukemia (See: Leukemia)
  33. Cancer, lip (See: Mouth cancer)
  34. Cancer, liver (See: Liver cancer)
  35. Cancer, lung (See: Lung cancer)
  36. Cancer, male breast (See: Male breast cancer)
  37. Cancer, Merkel cell (See: Merkel cell carcinoma)
  38. Cancer, mesothelioma (See: Mesothelioma)
  39. Cancer, mouth (See: Mouth cancer)
  40. Cancer, multiple myeloma (See: Multiple myeloma)
  41. Cancer, nasopharyngeal (See: Nasopharyngeal carcinoma)
  42. Cancer, neuroblastoma (See: Neuroblastoma)
  43. Cancer, non-Hodgkin's lymphoma (See: Non-Hodgkin's lymphoma)
  44. Cancer, oral (See: Mouth cancer)
  45. Cancer, oropharyngeal (See: Throat cancer)
  46. Cancer, ovarian (See: Ovarian cancer)
  47. Cancer, pancreatic (See: Pancreatic cancer)
  48. Cancer, paraneoplastic syndromes (See: Paraneoplastic syndromes of the nervous system)
  49. Cancer, pharyngeal (See: Throat cancer)
  50. Cancer, prostate (See: Prostate cancer)
  51. Cancer, rectal (See: Rectal cancer)
  52. Cancer, retinoblastoma (See: Retinoblastoma)
  53. Cancer, salivary gland (See: Salivary gland cancer)
  54. Cancer, skin (See: Skin cancer)
  55. Cancer, soft tissue sarcoma (See: Soft tissue sarcoma)
  56. Cancer, spinal tumor (See: Spinal tumor)
  57. Cancer, squamous cell (See: Squamous cell carcinoma)
  58. Cancer, stomach (See: Stomach cancer)
  59. Cancer, testicular (See: Testicular cancer)
  60. Cancer, throat (See: Throat cancer)
  61. Cancer, thyroid (See: Thyroid cancer)
  62. Cancer, uterine (See: Endometrial cancer)
  63. Cancer, vagina (See: Vaginal cancer)
  64. Cancer, vulvar (See: Vulvar cancer)
  65. Cancer, Wilms' tumor (See: Wilms' tumor)
  66. Candidiasis, oral (See: Oral thrush)
  67. Canker sore
  68. Carbon monoxide poisoning
  69. Carbuncles and boils (See: Boils and carbuncles)
  70. Carcinoid syndrome
  71. Carcinoid tumors
  72. Carcinoma of unknown primary
  73. Cardiac arrest, sudden (See: Sudden cardiac arrest)
  74. Cardiac ischemia (See: Myocardial ischemia)
  75. Cardiogenic shock
  76. Cardiomegaly (See: Enlarged heart)
  77. Cardiomyopathy
  78. Cardiomyopathy, dilated (See: Dilated cardiomyopathy)
  79. Cardiomyopathy, hypertrophic (See: Hypertrophic cardiomyopathy)
  80. Cardiovascular disease (See: Heart disease)
  81. Carotid artery disease
  82. Carpal tunnel syndrome
  83. Castleman disease
  84. Cataracts
  85. Causalgia (See: Complex regional pain syndrome)
  86. Cavernous malformations
  87. Cavities/tooth decay
  88. Celiac disease
  89. Cellulite
  90. Cellulitis
  91. Central nervous system vascular malformations
  92. Cercarial dermatitis (See: Swimmer's itch)
  93. Cerebral aneurysm (See: Brain aneurysm)
  94. Cerebral arteriovenous malformation (See: Arteriovenous malformation)
  95. Cerebral palsy
  96. Cerumen impaction (See: Earwax blockage)
  97. Cervical cancer
  98. Cervical dystonia
  99. Cervical osteoarthritis (See: Cervical spondylosis)
  100. Cervical spondylosis
  101. Cervicitis
  102. Chagas disease
  103. Charcot-Marie-Tooth disease
  104. Chemical dependency (See: Drug addiction)
  105. Chemo brain
  106. Chest pain
  107. Chest wall pain (See: Costochondritis)
  108. Chiari malformation
  109. Chickenpox
  110. Chilblains
  111. Child abuse
  112. Childhood apraxia of speech
  113. Childhood asthma
  114. Childhood disintegrative disorder
  115. Childhood obesity
  116. Childhood schizophrenia
  117. Chlamydia
  118. Cholangiocarcinoma (See: Gallbladder cancer)
  119. Cholangitis, primary sclerosing (See: Primary sclerosing cholangitis)
  120. Cholecystitis
  121. Cholera
  122. Cholestasis of pregnancy
  123. Cholesterol, high blood (See: High cholesterol)
  124. Chondromalacia patella
  125. Chondrosarcoma
  126. Chordoma
  127. Chorea, Huntington's (See: Huntington's disease)
  128. Chronic adrenal insufficiency (See: Addison's disease)
  129. Chronic constipation
  130. Chronic cough
  131. Chronic daily headaches
  132. Chronic exertional compartment syndrome
  133. Chronic fatigue syndrome
  134. Chronic fatigue syndrome (See: Chronic fatigue syndrome)
  135. Chronic granulomatous disease
  136. Chronic hives (urticaria)
  137. Chronic kidney disease
  138. Chronic kidney failure (See: Chronic kidney disease)
  139. Chronic lymphocytic leukemia
  140. Chronic lymphocytic thyroiditis (See: Hashimoto's disease)
  141. Chronic myelogenous leukemia
  142. Chronic obstructive pulmonary disease (See: COPD)
  143. Chronic pelvic pain in women
  144. Chronic sinusitis
  145. Chronic vulvar pain (See: Vulvodynia)
  146. Churg-Strauss syndrome
  147. Cirrhosis
  148. Cirrhosis, primary biliary (See: Primary biliary cirrhosis)
  149. CJD (See: Creutzfeldt-Jakob disease)
  150. Claudication
  151. Cleft lip and cleft palate
  152. Click-murmur syndrome (See: Mitral valve prolapse)
  153. Clinical depression (See: Depression)
  154. Clubfoot
  155. Cluster headache
  156. Coarctation of the aorta
  157. Coccidioidomycosis (See: Valley fever)
  158. Cold allergy (See: Cold urticaria)
  159. Cold exposure (See: Hypothermia)
  160. Cold sore
  161. Cold urticaria
  162. Cold, common (See: Common cold)
  163. Colic
  164. Colitis, collagenous (See: Microscopic colitis)
  165. Colitis, ischemic (See: Ischemic colitis)
  166. Colitis, lymphocytic (See: Microscopic colitis)
  167. Colitis, microscopic (See: Microscopic colitis)
  168. Colitis, pseudomembranous (See: Pseudomembranous colitis)
  169. Colitis, ulcerative (See: Ulcerative colitis)
  170. Collagenous colitis (See: Microscopic colitis)
  171. Collapsed lung (See: Pneumothorax)
  172. Colon cancer
  173. Colon polyps
  174. Colonic ischemia (See: Ischemic colitis)
  175. Colorblindness (See: Poor color vision)
  176. Colorectal cancer (See: Colon cancer)
  177. Coma
  178. Common cold
  179. Common cold in babies
  180. Common variable immunodeficiency
  181. Common warts
  182. Compartment syndrome, chronic exertional (See: Chronic exertional compartment syndrome)
  183. Complex regional pain syndrome
  184. Complicated bereavement (See: Complicated grief)
  185. Complicated grief
  186. Compulsive gambling
  187. Compulsive hoarding syndrome (See: Hoarding disorder)
  188. Compulsive overeating (See: Binge-eating disorder)
  189. Compulsive sexual behavior
  190. Compulsive stealing (See: Kleptomania)
  191. Concussion
  192. Condylomata acuminata (See: Genital warts)
  193. Congenital adrenal hyperplasia
  194. Congenital heart defects in children
  195. Congenital heart disease in adults
  196. Congenital megacolon (See: Hirschsprung's disease)
  197. Congenital myasthenic syndromes
  198. Congenital myopathies
  199. Congestive heart failure (See: Heart failure)
  200. Conjoined twins
  201. Conjunctivitis (See: Pink eye (conjunctivitis))
  202. Conn's syndrome (See: Primary aldosteronism)
  203. Constipation in children
  204. Contact dermatitis
  205. Convergence insufficiency
  206. Conversion disorder
  207. Cooley's anemia (See: Thalassemia)
  208. COPD
  209. Corns and calluses
  210. Coronary artery disease
  211. Corticobasal degeneration
  212. Costochondritis
  213. Costosternal chondrodynia (See: Costochondritis)
  214. Costosternal syndrome (See: Costochondritis)
  215. Cough headaches
  216. Cough, chronic (See: Chronic cough)
  217. Coxsackievirus infection (See: Hand-foot-and-mouth disease)
  218. Crabs (See: Pubic lice (crabs))
  219. Cradle cap
  220. Cramp, muscle (See: Muscle cramp: How to provide relief)
  221. Cramps, menstrual (See: Menstrual cramps)
  222. Cranial arteritis (See: Giant cell arteritis)
  223. Craniopharyngioma
  224. Craniosynostosis
  225. Creutzfeldt-Jakob disease
  226. Crib death (See: Sudden infant death syndrome (SIDS))
  227. Crohn's disease
  228. Croup
  229. Cryoglobulinemia
  230. Cryptorchidism (See: Undescended testicle)
  231. Cryptosporidiosis (See: Cryptosporidium infection)
  232. Cryptosporidium infection
  233. Curvature of the penis (See: Peyronie's disease)
  234. Curvature of the spine (See: Scoliosis)
  235. Cushing syndrome
  236. Cutaneous T-cell lymphoma
  237. Cyclic vomiting syndrome
  238. Cyclospora infection
  239. Cyclothymia
  240. Cyclothymic disorder (See: Cyclothymia)
  241. Cyst, Bartholin's (See: Bartholin's cyst)
  242. Cyst, ganglion (See: Ganglion cyst)
  243. Cyst, kidney (See: Kidney cysts)
  244. Cyst, ovarian (See: Ovarian cysts)
  245. Cyst, pancreatic (See: Pancreatic cysts)
  246. Cyst, pilonidal (See: Pilonidal cyst)
  247. Cyst, spermatic (See: Spermatocele)
  248. Cystic fibrosis
  249. Cystitis
  250. Cystitis, interstitial (See: Interstitial cystitis)
  251. Cystocele
  252. Cysts, epidermoid (See: Epidermoid (sebaceous) cysts)
  253. Cysts, sebaceous (See: Epidermoid (sebaceous) cysts)
  254. Cytomegalovirus (CMV) infection
  255. Cytomegalovirus infection (See: Cytomegalovirus (CMV) infection)
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