| Label | Id | |
|---|---|---|
| osteopetrosis | 0017198 | |
| osteopoikilosis | 0001414 | |
| osteoporosis | 0005298 | |
| osteoradionecrosis | 0043735 | |
| osteosarcoma | 0009807 | |
| osteosclerosis | 0002933 | |
| ostertagiasis | 0005891 | |
| otomycosis | 0000262 | |
| otosalpingitis | 0002172 | |
| otosclerosis | 0005349 | |
| ovarioleukodystrophy | 0020506 | |
| overnutrition | 0003916 | |
| oxoglutaricaciduria | 0008759 | |
| palsy | 0006496 | |
| pancolitis | 0005536 |