1. A fib, also known asAtrial fibrillation)
  2. Abdominal aortic aneurysm
  3. Abnormally excessive sweating, also known asHyperhidrosis)
  4. Abscess, Bartholin's, also known asBartholin's cyst)
  5. Absence seizure
  6. AC joint separation, also known asSeparated shoulder)
  7. Acanthosis nigricans
  8. Achalasia
  9. Achilles tendinitis
  10. Achilles tendon rupture
  11. Acid reflux, also known asGastroesophageal reflux disease (GERD))
  12. Acid reflux, infant, also known asInfant reflux)
  13. ACL injury
  14. Acne
  15. Acoustic neuroma
  16. Acquired immunodeficiency syndrome, also known asHIV/AIDS)
  17. Acromegaly
  18. Acromioclavicular joint separation, also known asSeparated shoulder)
  19. Actinic keratosis
  20. Acute coronary syndrome
  21. Acute febrile neutrophilic dermatosis, also known asSweet's syndrome)
  22. Acute flaccid myelitis (AFM)
  23. Acute granulocytic leukemia, also known asAcute myelogenous leukemia)
  24. Acute inflammatory demyelinating polyneuropathy, also known asGuillain-Barre syndrome)
  25. Acute kidney failure
  26. Acute liver failure
  27. Acute lymphoblastic leukemia, also known asAcute lymphocytic leukemia)
  28. Acute lymphocytic leukemia
  29. Acute lymphoid leukemia, also known asAcute lymphocytic leukemia)
  30. Acute myeloblastic leukemia, also known asAcute myelogenous leukemia)
  31. Acute myelogenous leukemia
  32. Acute myeloid lukemia, also known asAcute myelogenous leukemia)
  33. Acute nonlymphocytic leukemia, also known asAcute myelogenous leukemia)
  34. Acute radiation sickness, also known asRadiation sickness)
  35. Acute radiation syndrome, also known asRadiation sickness)
  36. Acute renal failure, also known asAcute kidney failure)
  37. Acute respiratory distress syndrome, also known asARDS)
  38. Acute sinusitis
  39. Addiction, alcohol, also known asAlcohol use disorder)
  40. Addiction, drug, also known asDrug addiction (substance use disorder))
  41. Addiction, gambling, also known asCompulsive gambling)
  42. Addiction, nicotine, also known asNicotine dependence)
  43. Addison's disease
  44. Adenitis, mesenteric, also known asMesenteric lymphadenitis)
  45. Adenomyosis
  46. ADHD in children, also known asAttention-deficit/hyperactivity disorder (ADHD) in children)
  47. ADHD, Adult, also known asAdult attention-deficit/hyperactivity disorder (ADHD))
  48. Adhesive capsulitis, also known asFrozen shoulder)
  49. Adjustment disorders
  50. Adnexal tumors
  51. Adolescent schizophrenia, also known asChildhood schizophrenia)
  52. Adrenal cancer
  53. Adrenal gland tumor, also known asPheochromocytoma)
  54. Adrenal mass, also known asBenign adrenal tumors)
  55. Adrenoleukodystrophy
  56. Adult attention-deficit/hyperactivity disorder (ADHD)
  57. Adult Still's disease
  58. AFM, also known asAcute flaccid myelitis (AFM))
  59. Age spots (liver spots)
  60. Age-related macular degeneration, dry, also known asDry macular degeneration)
  61. Age-related macular degeneration, wet, also known asWet macular degeneration)
  62. Agnogenic myeloid metaplasia, also known asMyelofibrosis)
  63. Agoraphobia
  64. AIDP, also known asGuillain-Barre syndrome)
  65. AIDS/HIV, also known asHIV/AIDS)
  66. Airplane ear
  67. Albinism
  68. Alcohol addiction, also known asAlcohol use disorder)
  69. Alcohol intolerance
  70. Alcohol poisoning
  71. Alcohol use disorder
  72. Alcoholic hepatitis
  73. Aldosteronoma, also known asPrimary aldosteronism)
  74. Allergic granulomatosis, also known asChurg-Strauss syndrome)
  75. Allergic granulomatosis and angiitis, also known asChurg-Strauss syndrome)
  76. Allergic rhinitis, also known asHay fever)
  77. Allergies
  78. Allergy, dust mite, also known asDust mite allergy)
  79. Allergy, egg, also known asEgg allergy)
  80. Allergy, food, also known asFood allergy)
  81. Allergy, latex, also known asLatex allergy)
  82. Allergy, milk, also known asMilk allergy)
  83. Allergy, mold, also known asMold allergy)
  84. Allergy, nickel, also known asNickel allergy)
  85. Allergy, peanut, also known asPeanut allergy)
  86. Allergy, penicillin, also known asPenicillin allergy)
  87. Allergy, pet, also known asPet allergy)
  88. Allergy, shellfish, also known asShellfish allergy)
  89. Allergy, soy, also known asSoy allergy)
  90. Allergy, wheat, also known asWheat allergy)
  91. Alopecia, also known asHair loss)
  92. Alpha-gal syndrome
  93. ALS, also known asAmyotrophic lateral sclerosis (ALS))
  94. Alveolar osteitis, also known asDry socket)
  95. Alzheimer's disease
  96. Ambiguous genitalia
  97. Amblyopia, also known asLazy eye (amblyopia))
  98. Ameloblastoma
  99. Amenorrhea
  100. American trypanosomiasis, also known asChagas disease)
  101. Amnesia
  102. Amnesia, transient global, also known asTransient global amnesia)
  103. Amnestic syndrome, also known asAmnesia)
  104. Amniotic fluid embolism
  105. Ampullary cancer
  106. Amyloid disease, also known asAmyloidosis)
  107. Amyloidosis
  108. Amyotrophic lateral sclerosis (ALS)
  109. Anal cancer
  110. Anal fissure
  111. Anal fistula
  112. Anal itching
  113. Anaphylaxis
  114. Anemia
  115. Anemia, aplastic, also known asAplastic anemia)
  116. Anemia, Cooley's, also known asThalassemia)
  117. Anemia, iron deficiency, also known asIron deficiency anemia)
  118. Anemia, Mediterranean, also known asThalassemia)
  119. Anemia, sickle cell, also known asSickle cell anemia)
  120. Anemia, vitamin deficiency, also known asVitamin deficiency anemia)
  121. Aneurysm, abdominal aortic, also known asAbdominal aortic aneurysm)
  122. Aneurysm, aortic, also known asAortic aneurysm)
  123. Aneurysm, brain, also known asBrain aneurysm)
  124. Aneurysm, cerebral, also known asBrain aneurysm)
  125. Aneurysm, popliteal, also known asPopliteal artery aneurysm)
  126. Aneurysm, thoracic aortic, also known asThoracic aortic aneurysm)
  127. Aneurysms
  128. Angelman syndrome
  129. Angiitis, also known asVasculitis)
  130. Angina
  131. Angina pectoris, also known asAngina)
  132. Angioedema and hives, also known asHives and angioedema)
  133. Angiofollicular lymph node hyperplasia, also known asCastleman disease)
  134. Angiosarcoma
  135. Anhidrosis
  136. Ankle fracture, also known asBroken ankle)
  137. Ankle sprain, also known asSprained ankle)
  138. Ankyloglossia, also known asTongue-tie (ankyloglossia))
  139. Ankylosing spondylitis
  140. Anorexia, also known asAnorexia nervosa)
  141. Anorexia nervosa
  142. Anorgasmia in women
  143. Anterior cruciate ligament injury, also known asACL injury)
  144. Anterior prolapse (cystocele)
  145. Anterior vaginal prolapse, also known asAnterior prolapse (cystocele))
  146. Anthrax
  147. Antibiotic-associated colitis, also known asPseudomembranous colitis)
  148. Antibiotic-associated diarrhea
  149. Antiphospholipid syndrome
  150. Antisocial personality disorder
  151. Anxiety disorder, generalized, also known asGeneralized anxiety disorder)
  152. Anxiety disorder, social, also known asSocial anxiety disorder (social phobia))
  153. Anxiety disorders
  154. Aortic aneurysm
  155. Aortic aneurysm, abdominal, also known asAbdominal aortic aneurysm)
  156. Aortic coarctation, also known asCoarctation of the aorta)
  157. Aortic dissection
  158. Aortic valve disease
  159. Aortic valve regurgitation
  160. Aortic valve stenosis
  161. Aphasia
  162. Aphasia, primary progressive, also known asPrimary progressive aphasia)
  163. Aphthous stomatitis, also known asCanker sore)
  164. Aphthous ulcer, also known asCanker sore)
  165. Apical ballooning syndrome, also known asBroken heart syndrome)
  166. Aplastic anemia
  167. Appendicitis
  168. ARDS
  169. Arenaviruses, also known asViral hemorrhagic fevers)
  170. Argentine hemorrhagic fever, also known asViral hemorrhagic fevers)
  171. Arm fracture, also known asBroken arm)
  172. Arnold-Chiari malformation, also known asChiari malformation)
  173. Arrhythmia, also known asHeart arrhythmia)
  174. Arteriosclerosis / atherosclerosis
  175. Arteriovenous fistula
  176. Arteriovenous malformation
  177. Arteritis, giant cell, also known asGiant cell arteritis)
  178. Arteritis, Takayasu's, also known asTakayasu's arteritis)
  179. Arthritis
  180. Arthritis, basal joint, also known asThumb arthritis)
  181. Arthritis, degenerative, also known asOsteoarthritis)
  182. Arthritis, gouty, also known asGout)
  183. Arthritis, infectious, also known asSeptic arthritis)
  184. Arthritis, juvenile idiopathic, also known asJuvenile idiopathic arthritis)
  185. Arthritis, osteoarthritis, also known asOsteoarthritis)
  186. Arthritis, psoriatic, also known asPsoriatic arthritis)
  187. Arthritis, reactive, also known asReactive arthritis)
  188. Arthritis, rheumatoid, also known asRheumatoid arthritis)
  189. Arthritis, septic, also known asSeptic arthritis)
  190. Arthritis, thumb, also known asThumb arthritis)
  191. Asbestosis
  192. Ascariasis
  193. ASD, also known asAtrial septal defect (ASD))
  194. Aseptic necrosis, also known asAvascular necrosis)
  195. Aspergillosis
  196. Asthma
  197. Asthma attack
  198. Asthma, childhood, also known asChildhood asthma)
  199. Asthma, exercise-induced, also known asExercise-induced asthma)
  200. Asthma, occupational, also known asOccupational asthma)
  201. Astigmatism
  202. Astrocytoma
  203. AT, also known asAtrial tachycardia)
  204. Ataxia
  205. Atelectasis
  206. Atherosclerosis, also known asArteriosclerosis / atherosclerosis)
  207. Athlete's foot
  208. Atopic dermatitis (eczema)
  209. Atrial fibrillation
  210. Atrial flutter
  211. Atrial septal defect (ASD)
  212. Atrial tachycardia
  213. Atrioventricular canal defect
  214. Atrioventricular nodal reentry tachycardia (AVNRT)
  215. Atrioventricular septal defect, also known asAtrioventricular canal defect)
  216. Atrophic vaginitis, also known asVaginal atrophy)
  217. Attachment disorder, also known asReactive attachment disorder)
  218. Attention-deficit/hyperactivity disorder (ADHD) in children
  219. Attention-deficit/hyperactivity disorder in adults, also known asAdult attention-deficit/hyperactivity disorder (ADHD))
  220. Atypical depression
  221. Atypical hyperplasia of the breast
  222. Autism spectrum disorder
  223. Autoimmune hepatitis
  224. Autoimmune pancreatitis
  225. Autonomic neuropathy
  226. Avascular necrosis
  227. Avian influenza, also known asBird flu (avian influenza))
  228. AVN, also known asAvascular necrosis)
  229. AVNRT, also known asAtrioventricular nodal reentry tachycardia (AVNRT))
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