| Abdomen distended | http://bio2rdf.org/meddra:C0000731 | | |
| Abdominal Abscess | http://bio2rdf.org/meddra:C0243001 | | |
| Abdominal bloating | http://bio2rdf.org/meddra:C1291077 | | |
| Abdominal colic | http://bio2rdf.org/meddra:C0232488 | | |
| Abdominal Cramps | http://bio2rdf.org/meddra:C0000729 | | |
| Abdominal distress | http://bio2rdf.org/meddra:C0235295 | | |
| Abdominal Pain | http://bio2rdf.org/meddra:C0000737 | | |
| Abnormal behavior | http://bio2rdf.org/meddra:C0233514 | | |
| Abnormal coordination | http://bio2rdf.org/meddra:C0520966 | | |
| Abnormal involuntary movements | http://bio2rdf.org/meddra:C0392702 | | |
| Abnormal mental state | http://bio2rdf.org/meddra:C0278061 | | |
| Abortion, Septic | http://bio2rdf.org/meddra:C0000817 | | |
| Abruptio Placentae | http://bio2rdf.org/meddra:C0000832 | | |
| Abscess | http://bio2rdf.org/meddra:C0000833 | | |
| Absence Epilepsy | http://bio2rdf.org/meddra:C0014553 | | |
| Acanthamoeba Keratitis | http://bio2rdf.org/meddra:C0000880 | | |
| Ache | http://bio2rdf.org/meddra:C0234238 | | |
| Achlorhydria | http://bio2rdf.org/meddra:C0001075 | | |
| Acid-base disorders | http://bio2rdf.org/meddra:C0740265 | | |
| Acidemia | http://bio2rdf.org/meddra:C0268030 | | |
| Acid indigestion | http://bio2rdf.org/meddra:C0235304 | | |
| Acidosis | http://bio2rdf.org/meddra:C0001122 | | |
| Acidosis, Lactic | http://bio2rdf.org/meddra:C0001125 | | |
| Acidosis, Respiratory | http://bio2rdf.org/meddra:C0001127 | | |
| Acne | http://bio2rdf.org/meddra:C0702166 | | |
| Acne conglobata | http://bio2rdf.org/meddra:C0263442 | | |
| Acne cystic | http://bio2rdf.org/meddra:C0010666 | | |
| Acne pustular | http://bio2rdf.org/meddra:C0263443 | | |
| Acne Vulgaris | http://bio2rdf.org/meddra:C0001144 | | |
| Acrocyanosis | http://bio2rdf.org/meddra:C0221347 | | |