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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. Catatonic schizophrenia
  86. Causalgia (See: Complex regional pain syndrome)
  87. Cavernous malformations
  88. Cavities/tooth decay
  89. Celiac disease
  90. Cellulite
  91. Cellulitis
  92. Central nervous system vascular malformations
  93. Cercarial dermatitis (See: Swimmer's itch)
  94. Cerebral aneurysm (See: Brain aneurysm)
  95. Cerebral arteriovenous malformation (See: Arteriovenous malformation)
  96. Cerebral palsy
  97. Cerumen impaction (See: Earwax blockage)
  98. Cervical cancer
  99. Cervical dystonia
  100. Cervical osteoarthritis (See: Cervical spondylosis)
  101. Cervical spondylosis
  102. Cervicitis
  103. Chagas disease
  104. Charcot-Marie-Tooth disease
  105. Chemical dependency (See: Drug addiction)
  106. Chemo brain
  107. Chest pain
  108. Chest wall pain (See: Costochondritis)
  109. Chiari malformation
  110. Chickenpox
  111. Chilblains
  112. Child abuse
  113. Childhood apraxia of speech
  114. Childhood asthma
  115. Childhood disintegrative disorder
  116. Childhood obesity
  117. Childhood schizophrenia
  118. Chlamydia
  119. Cholangiocarcinoma (See: Gallbladder cancer)
  120. Cholangitis, primary sclerosing (See: Primary sclerosing cholangitis)
  121. Cholecystitis
  122. Cholera
  123. Cholestasis of pregnancy
  124. Cholesterol, high blood (See: High cholesterol)
  125. Chondromalacia patella
  126. Chondrosarcoma
  127. Chordoma
  128. Chorea, Huntington's (See: Huntington's disease)
  129. Chronic adrenal insufficiency (See: Addison's disease)
  130. Chronic constipation
  131. Chronic cough
  132. Chronic daily headaches
  133. Chronic exertional compartment syndrome
  134. Chronic fatigue syndrome
  135. Chronic fatigue syndrome (See: Chronic fatigue syndrome)
  136. Chronic granulomatous disease
  137. Chronic hives (urticaria)
  138. Chronic kidney disease
  139. Chronic kidney failure (See: Chronic kidney disease)
  140. Chronic lymphocytic leukemia
  141. Chronic lymphocytic thyroiditis (See: Hashimoto's disease)
  142. Chronic myelogenous leukemia
  143. Chronic obstructive pulmonary disease (See: COPD)
  144. Chronic pelvic pain in women
  145. Chronic sinusitis
  146. Chronic vulvar pain (See: Vulvodynia)
  147. Churg-Strauss syndrome
  148. Cirrhosis
  149. Cirrhosis, primary biliary (See: Primary biliary cirrhosis)
  150. CJD (See: Creutzfeldt-Jakob disease)
  151. Claudication
  152. Cleft lip and cleft palate
  153. Click-murmur syndrome (See: Mitral valve prolapse)
  154. Clinical depression (See: Depression)
  155. Clubfoot
  156. Cluster headache
  157. Coarctation of the aorta
  158. Coccidioidomycosis (See: Valley fever)
  159. Cold allergy (See: Cold urticaria)
  160. Cold exposure (See: Hypothermia)
  161. Cold sore
  162. Cold urticaria
  163. Cold, common (See: Common cold)
  164. Colic
  165. Colitis, collagenous (See: Microscopic colitis)
  166. Colitis, ischemic (See: Ischemic colitis)
  167. Colitis, lymphocytic (See: Microscopic colitis)
  168. Colitis, microscopic (See: Microscopic colitis)
  169. Colitis, pseudomembranous (See: Pseudomembranous colitis)
  170. Colitis, ulcerative (See: Ulcerative colitis)
  171. Collagenous colitis (See: Microscopic colitis)
  172. Collapsed lung (See: Pneumothorax)
  173. Colon cancer
  174. Colon polyps
  175. Colonic ischemia (See: Ischemic colitis)
  176. Colorblindness (See: Poor color vision)
  177. Colorectal cancer (See: Colon cancer)
  178. Coma
  179. Common cold
  180. Common cold in babies
  181. Common variable immunodeficiency
  182. Common warts
  183. Compartment syndrome, chronic exertional (See: Chronic exertional compartment syndrome)
  184. Complex regional pain syndrome
  185. Complicated bereavement (See: Complicated grief)
  186. Complicated grief
  187. Compulsive gambling
  188. Compulsive hoarding syndrome (See: Hoarding)
  189. Compulsive overeating (See: Binge-eating disorder)
  190. Compulsive sexual behavior
  191. Compulsive stealing (See: Kleptomania)
  192. Concussion
  193. Condylomata acuminata (See: Genital warts)
  194. Congenital adrenal hyperplasia
  195. Congenital heart defects in children
  196. Congenital heart disease
  197. Congenital heart disease in adults
  198. Congenital megacolon (See: Hirschsprung's disease)
  199. Congenital myasthenic syndromes
  200. Congenital myopathies
  201. Congestive heart failure (See: Heart failure)
  202. Conjoined twins
  203. Conjunctivitis (See: Pink eye (conjunctivitis))
  204. Conn's syndrome (See: Primary aldosteronism)
  205. Constipation in children
  206. Contact dermatitis
  207. Convergence insufficiency
  208. Conversion disorder
  209. Cooley's anemia (See: Thalassemia)
  210. COPD
  211. Corns and calluses
  212. Coronary artery disease
  213. Corticobasal degeneration
  214. Costochondritis
  215. Costosternal chondrodynia (See: Costochondritis)
  216. Costosternal syndrome (See: Costochondritis)
  217. Cough headaches
  218. Cough, chronic (See: Chronic cough)
  219. Coxsackievirus infection (See: Hand-foot-and-mouth disease)
  220. Crabs (See: Pubic lice (crabs))
  221. Cradle cap
  222. Cramp, muscle (See: Muscle cramp: How to provide relief)
  223. Cramps, menstrual (See: Menstrual cramps)
  224. Cranial arteritis (See: Giant cell arteritis)
  225. Craniopharyngioma
  226. Craniosynostosis
  227. Creutzfeldt-Jakob disease
  228. Crib death (See: Sudden infant death syndrome (SIDS))
  229. Crohn's disease
  230. Croup
  231. Cryoglobulinemia
  232. Cryptorchidism (See: Undescended testicle)
  233. Cryptosporidiosis (See: Cryptosporidium infection)
  234. Cryptosporidium infection
  235. Curvature of the penis (See: Peyronie's disease)
  236. Curvature of the spine (See: Scoliosis)
  237. Cushing syndrome
  238. Cutaneous T-cell lymphoma
  239. Cyclic vomiting syndrome
  240. Cyclospora infection
  241. Cyclothymia
  242. Cyclothymic disorder (See: Cyclothymia)
  243. Cyst, Bartholin's (See: Bartholin's cyst)
  244. Cyst, ganglion (See: Ganglion cyst)
  245. Cyst, kidney (See: Kidney cysts)
  246. Cyst, ovarian (See: Ovarian cysts)
  247. Cyst, pancreatic (See: Pancreatic cysts)
  248. Cyst, pilonidal (See: Pilonidal cyst)
  249. Cyst, spermatic (See: Spermatocele)
  250. Cystic fibrosis
  251. Cystitis
  252. Cystitis, interstitial (See: Interstitial cystitis)
  253. Cystocele
  254. Cysts, epidermoid (See: Epidermoid (sebaceous) cysts)
  255. Cysts, sebaceous (See: Epidermoid (sebaceous) cysts)
  256. Cytomegalovirus (CMV) infection
  257. Cytomegalovirus infection (See: Cytomegalovirus (CMV) infection)
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