Criteria to aid in determination of primary site of endometrioid carcinoma

Favors ovarian primary	Favors endometrial primary	Favors synchronous primaries
Minimal to no myometrial invasion	Deep myometrial invasion (>1/3 of myometrium)	Minimal to no myometrial invasion
No vascular lymphovascular invasion in uterus	Uterine lymphovascular invasion present	No vascular lymphovascular invasion in uterus or ovary
Unilateral mass in ovary	Bilateral masses in ovaries	Unilateral mass in ovary
No ovarian surface involvement	Ovarian surface involvement present	No ovarian surface involvement
Large ovarian mass with expansile growth pattern	Smaller ovarian mass with multinodular growth pattern	Large ovarian mass with expansile growth pattern
Background endometriois or endometrioid borderline neoplasm	Complex atypical hyperplasia present in uterus	Background endometriosis or endometrioid borderline neoplasm in ovary in addition to complex atypical hyperplasia present in uterus

Graphic 91232 Version 1.0