Table 1 True positive and false negative results for the evaluation of the osteonecrotic lesion with X-rays
| Â | Location | Complains of symptomatic sites | ON lesions MRI | X-rays | |
|---|---|---|---|---|---|
True positive | False negative | ||||
1 | Humeral Head | 21 | 18 | 14 | 4 |
2 | Humeral Condyles | 2 | 2 | 1 | 1 |
3 | Acetabulum | 17 | 17 | 1 | 16 |
4 | Sacrum | 1 | 1 | 0 | 1 |
5 | Pubic Bone | 1 | 1 | 0 | 1 |
6 | Ilium | 4 | 4 | 0 | 4 |
7 | Ischial Tuberocity | 4 | 4 | 0 | 4 |
8 | Femur | 9 | 9 | 7 | 2 |
9 | Femur Condyles | 7 | 7 | 5 | 2 |
10 | Tibia Plateau | 2 | 2 | 0 | 2 |
11 | Patella | 1 | 1 | 1 | 0 |
12 | Tibia | 8 | 6 | 3 | 3 |
13 | Talus | 3 | 3 | 1 | 2 |
14 | Navicular | 1 | 1 | 0 | 1 |
| Â | Total | 81 | 76 | 33 | 43 |