Table 1. Clinicopathological summary of endometrial papillary proliferations.

Case	Clinical feature						Histopathological feature
	Age	MP	HRT	Previousgynecologicalhistory	Clinicalpresentation	Currentstatus	Type ofspecimen	Pattern ofpapillaryproliferation	Volume ofpapillaryproliferation	Metaplasticepithelialchange	Relation withEM hyperplasia or carcinoma
1	57	Yes	No	Cervical HSIL	No symptom	NED	Hysterectomy	Simple	<10% of entire EM	M, C, E, P	No
2	65	Yes	No	No	Vaginal bleeding, EM polyp	NED	Curettage	Complex	80% of EM polyp	M, E	Subsequent atypical hyperplasia/EIN in hysterectomy specimen (after 4 months)
3	64	Yes	Yes	No	Vaginal bleeding, Thickened EM	NED	Curettage	Simple	<10% of entire EM	M, C, E	Subsequent hyperplasia without atypia in hysterectomy specimen (after 3 months)
4	70	Yes	No	EM hyperplasia without atypia	Vaginal spotting, Thickened EM	NED	Hysterectomy	Simple	<10% of entire EM	M, E	Coexistent well-differentiated EM carcinoma in hysterectomy specimen

C: ciliated cell metaplasia, E: eosinophilic cell change, EIN: endometrioid intraepithelial neoplasia, EM: endometrium, HRT: hormone replacement therapy, HSIL: high-grade squamous intraepithelial lesion, M: mucinous metaplasia, MP: menopause, NED: no evidence of disease, P: papillary syncytial metaplasia.