Abstract
Summary One case of extraovarian primary peritoneal carcinoma is reported. This rare interesting tumor is characterized by a peritoneal carcinomatosis with ascites and by a histological pattern similar to ovarian serous papillary carcinoma, but it either spares the ovaries or involves the surface of the ovaries only microscopically. The patient had abdominal swelling, ascites with positive cytology, and elevated serum CA-125. At surgery multifocal or diffuse peritoneal involvement was found. Microscopic ovarian serosal surface involvement was demonstrated. Tumor cells stained positive for cytokeratin (AE1/AE3), epithelial membrane antigen, B72.3, Ber-EP4, Leu-M1, p53, carcinoembryonic antigen, placental alkaline phosphatase, S-100, CA-125, and estrogen receptors.
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