The three cases herein reported concern metachronous ovarian metastases from primary adenocarcinomas of the colon associated with mesothelial cysts. Although the etiology of these cysts remains obscure, the cases were of interest because the cysts did not contain tumor cells despite the intimate relationship to the tumor. Metastases were localized to the ovary and were resectable. All signs and symptoms disappeared, affording excellent palliation and an extended survival.