| Class |
Findings |
| I |
No abnormal findings. |
| II |
Inflammatory findings or reactive changes because of an intrauterine device(IUD). |
| IIb |
Papillary clusters with few structural abnormalities.
Complex hyperplasia not fully suspected but follow-up necessary. |
| III |
Papillary clusters accompanied by structural abnormalities.
Complex hyperplasia suspected. |
| IV |
Small number of arborescent clusters.
Complex hyperplasia with atypiaor worse suspected. |
| V |
Clear glandular cavity with back-to-back structures and arborescent clusters. Endometrial cancer diagnosed. |
