[Adenomatoid tumors in the uterus: an immunohistochemical and ultrastructural study]

In 2 cases of adenomatoid tumors of the uterus FVIII, keratin, vimentin and carcinoembryonic antigen (CEA) were observed by immunohistochemical method. No staining for FVIII and CEA were seen in the tumor cells but staining for keratin and vimentin were seen coexistent in the tumor cells. Electron microscopic finding showed tumor cells attached to one another by numerous long slender microvill. Adenomatoid tumors had typical mesothelial features. It suggests that adenomatoid tumor may be a mesothelioma.