Primary papillary serous carcinoma of the peritoneum in a man

Background: Primary papillary serous carcinoma of the peritoneum is a well- known entity in women. The tumour is derived from the extraovarian mesothel ium and the pelvis and lower abdomen mesothelia. The treatment strategies a re similar to ovarian serous papillary carcinoma. Patients and methods: A case of primary serous papillary carcinoma of the p eritoneum in a man is presented. The patient, 53 years old, died 2 months a fter diagnosis. Results: The histologic and immunohistochemical studies of the tumour will be presented. These studies, made during lifetime and at autopsy of the pat ient, confirm a diagnosis of primary serous papillary carcinoma of the peri toneum. Conclusions: primary serous papillary carcinoma of the peritoneum can occur in men, and should be considered in the differential diagnosis in cases of abdominal carcinomatosis of unknown origin. Treatment options remain to be determined.