| Adrenal Gland Neoplasms | http://bio2rdf.org/meddra:C0001624 | | |
| Congenital adrenal hyperplasia | http://bio2rdf.org/meddra:C0001627 | | |
| Agammaglobulinemia | http://bio2rdf.org/meddra:C0001768 | | |
| Aggressive behavior | http://bio2rdf.org/meddra:C0001807 | | |
| Agoraphobia | http://bio2rdf.org/meddra:C0001818 | | |
| Agranulocytosis | http://bio2rdf.org/meddra:C0001824 | | |
| Airway Obstruction | http://bio2rdf.org/meddra:C0001883 | | |
| Albinism | http://bio2rdf.org/meddra:C0001916 | | |
| Albuminuria | http://bio2rdf.org/meddra:C0001925 | | |
| Alcohol Withdrawal Delirium | http://bio2rdf.org/meddra:C0001957 | | |
| Alcoholic Intoxication | http://bio2rdf.org/meddra:C0001969 | | |
| Alcoholic Intoxication, Chronic | http://bio2rdf.org/meddra:C0001973 | | |
| Alkalosis | http://bio2rdf.org/meddra:C0002063 | | |
| Alopecia | http://bio2rdf.org/meddra:C0002170 | | |
| Alopecia Areata | http://bio2rdf.org/meddra:C0002171 | | |
| Extrinsic allergic alveolitis | http://bio2rdf.org/meddra:C0002390 | | |
| Alzheimer's Disease | http://bio2rdf.org/meddra:C0002395 | | |
| Amblyopia tobacco | http://bio2rdf.org/meddra:C0002419 | | |
| Amebiasis | http://bio2rdf.org/meddra:C0002438 | | |
| Amenorrhea | http://bio2rdf.org/meddra:C0002453 | | |
| Amnesia | http://bio2rdf.org/meddra:C0002622 | | |
| Amyloidosis | http://bio2rdf.org/meddra:C0002726 | | |
| Amyotrophic Lateral Sclerosis | http://bio2rdf.org/meddra:C0002736 | | |
| anaphylaxis | http://bio2rdf.org/meddra:C0002792 | | |
| Anemia | http://bio2rdf.org/meddra:C0002871 | | |
| Aplastic Anemia | http://bio2rdf.org/meddra:C0002874 | | |
| Cooley's anemia | http://bio2rdf.org/meddra:C0002875 | | |
| Anemia, Hemolytic | http://bio2rdf.org/meddra:C0002878 | | |
| Anemia, Hemolytic, Acquired | http://bio2rdf.org/meddra:C0002879 | | |
| Autoimmune hemolytic anemia | http://bio2rdf.org/meddra:C0002880 | | |