1) A case of double cancer (endometrioid carcinoma of ovary and endometrial adenocarcinoma of uterus) occurred in a 61 year-old nullipara is presented.
2) On cytological specimen of a sucked fluid ob tained from the ovarian tumor, malignant cells derived from columnar epithelium and benign squamous cells were found, so that this ovarian tumor was diagnosed as adenoacanthoma which as later supported by histopathological find ings.
3) On imprinted specimen of the endometrial outgrowth, measured less than 2cm. in diam eter, only adenocarcinomatous cells were found as on the histological specimen.
4) From macroscopic and microscopic findings, this case was considered as of double cancer. Endo metrioid carcinoma of ovary and endometrial adenocarcinoma of uterus are a specific double cancer which has a close relationship to each other, because these neoplasms have common histogenesis of “coelomic epithelium”.
