General criteria | Modified gynecologic+specific criteria | |
Benign | <5 cm, non-infiltrative Non-high nuclear grade Mitotic count of ≤1 mitosis/12 mm² No necrosis No vascular invasion | – |
Uncertain malignant potential | Nuclear pleomorphism/multinucleated giant cells or <5 cm | Less than three of the following features:
|
Malignant | Two or more of the following features:
| Three or more features |
Mitotic count: 1 mitosis in 50 high-power fields of diameter 0.55 mm, area 0.24 mm².