Introduction:
Avascular Necrosis, Osteonecrosis - Everything You Need To Know - Dr. Nabil Ebraheim
| Location | Condition |
|---|---|
| UPPER EXTREMITY: | |
| Carpal ‣ | ‣ |
| Tarsal ‣ | ‣ |
| Metatarsal heads | ‣ |
| LOWER EXTREMITY: | |
| Femoral head | ‣ |
| Tibial tubercle | ‣ |
| VERTEBRAL COLUMN: | |
| Ring apophyses of spine | ‣ |
Imaging features
| Sequence of changes | |
|---|---|
| 1. Joint effusion | Earliest sign |
| 2. Patchy or mottled density | |
| 3. Subchondral lucency | Pathognomic (20% cases) |
| 4. Articular surface and joint fragmentation | |