| Abdominal Cramps | http://bio2rdf.org/meddra:C0000729 | | |
| Abdomen distended | http://bio2rdf.org/meddra:C0000731 | | |
| Abdominal Pain | http://bio2rdf.org/meddra:C0000737 | | |
| Congenital Abnormality | http://bio2rdf.org/meddra:C0000768 | | |
| Spontaneous abortion | http://bio2rdf.org/meddra:C0000786 | | |
| Missed abortion | http://bio2rdf.org/meddra:C0000814 | | |
| Abortion, Septic | http://bio2rdf.org/meddra:C0000817 | | |
| Abruptio Placentae | http://bio2rdf.org/meddra:C0000832 | | |
| Abscess | http://bio2rdf.org/meddra:C0000833 | | |
| Acanthamoeba Keratitis | http://bio2rdf.org/meddra:C0000880 | | |
| Achlorhydria | http://bio2rdf.org/meddra:C0001075 | | |
| Acidosis | http://bio2rdf.org/meddra:C0001122 | | |
| Acidosis, Lactic | http://bio2rdf.org/meddra:C0001125 | | |
| Renal tubular acidosis | http://bio2rdf.org/meddra:C0001126 | | |
| Acidosis, Respiratory | http://bio2rdf.org/meddra:C0001127 | | |
| Acne Vulgaris | http://bio2rdf.org/meddra:C0001144 | | |
| Acromegaly | http://bio2rdf.org/meddra:C0001206 | | |
| ACTH Syndrome, Ectopic | http://bio2rdf.org/meddra:C0001231 | | |
| Actinomycosis | http://bio2rdf.org/meddra:C0001261 | | |
| Pancreatitis acute | http://bio2rdf.org/meddra:C0001339 | | |
| Acute pharyngitis | http://bio2rdf.org/meddra:C0001344 | | |
| Acute tonsillitis | http://bio2rdf.org/meddra:C0001361 | | |
| Adams-Stokes Syndrome | http://bio2rdf.org/meddra:C0001396 | | |
| Addison Disease | http://bio2rdf.org/meddra:C0001403 | | |
| Adenocarcinoma | http://bio2rdf.org/meddra:C0001418 | | |
| Adenoma | http://bio2rdf.org/meddra:C0001430 | | |
| Adnexitis | http://bio2rdf.org/meddra:C0001577 | | |
| Adrenal Gland Diseases | http://bio2rdf.org/meddra:C0001621 | | |
| Adrenal Gland Hyperfunction | http://bio2rdf.org/meddra:C0001622 | | |
| Adrenal gland hypofunction | http://bio2rdf.org/meddra:C0001623 | | |