Non-ovarian peritoneal papillary serous carcinoma with high CA125 levels.

A patient with peritoneal papillary serous carcinoma involving the colon and omentum is presented. Following palliative right-sided hemicolectomy and partial omentectomy, chemotherapy was given. The patient had a second look operation after 6 months when a pelvic clearance was done and histology revealed some residual tumor in one mesosalpinx. She was well and clinically free of recurrence after a further 6 months. Serum CA125 and CEA levels were measured and CA125 levels remained high throughout.