Benign heterologous tissue components associated with endometrial carcinoma.

ABSTRACT

Two cases of adenocarcinoma of the endometrium associated with benign mesenchymal tissues of adipose and osteoid type are presented. These components have a metaplastic or metamorphic, rather than neoplastic, origin. Heterologous elements associated with adenocarcinoma should not be mistaken for the more common mixed mesodermal müllerian tumors which have a different clinicopathologic behavior.