| Osgood-Schlatter [1] |
| Osgood-Schlatter's syndrome [1] |
| Osteoartritis [1] |
| Osteoartritis de rodilla [2] |
| Osteoartrosis [4] |
| Osteoartrosis de rodilla [2] |
| Osteoartrosis grado II [1] |
| Osteochondritis [1] |
| Osteocondritis [1] |
| Osteocondritis juvenil [1] |
| Osteopenia [1] |
| Osteoporosis [9] |
| Osteoporosis idiopática juvenil [1] |
| Osteoporosis postmenopáusica [1] |
| Osteosintesis de cadera [1] |
| Osteosíntesis de cadera [2] |
| ostreatus [1] |
| ostuncalco [1] |
| ovejitas [1] |
| overseas [1] |