Table 1 Histologic criteria employed in this study for the diagnosis of uterine smooth muscle tumors
From: Diagnostic value of progesterone receptor and p53 expression in uterine smooth muscle tumors
Diagnosis | Tumor cell necrosis | Atypia | MF/10 HPF* |
|---|---|---|---|
Leiomyosarcoma | Present | Diffuse moderate to severe | Any level |
|  | Present | None to mild | ≥ 10 |
|  | Absent | Diffuse moderate to severe | ≥ 10 |
STUMP | Present | None to mild | < 10 |
| Â | Absent | Diffuse moderate to severe | 5-9 or atypical mitotic figures |
|  | Absent | Focal moderate to severe | ≥ 5 |
Atypical leiomyoma | Absent | Focal or diffuse moderate to severe | < 5 |
Leiomyoma | Absent | None to mild | < 5 |