| Margin of the lesion | Histopathological diagnosis | Total n (%) | |
| Malignant n (%) | Benign n (%) | ||
| Ill defined | 12 (42.9) | 6 (27.3) | 18 (36.0) |
| Well defined | 16 (57.1) | 16 (72.7) | 32 (64.0) |
| Total | 28 (100.0) | 22 (100.0) | 50 (100.0) |