Prevalence of primary papillary peritoneal neoplasia in patients with ovarian carcinoma
The original publication is available at http://archive.samj.org.za/
Primary papillary peritoneal neoplasia (PPPN) is a recently recognized disease entity. Macroscopically it resembles ovarian carcinoma. On microscopic examination it also superficially resembles serous ovarian adenocarcinoma, but in PPPN the epithelial cells are single-layered and well differentiated with very rare mitoses, and numerous psammoma bodies are found. In a retrospective review of 61 consecutive patients with serous or papillary ovarian adenocarcinoma seen over a 7-year period, 4 patients with PPPN were found (6.5%). One of these patients was in clinical stage I, 2 were in stage II and 1 was in stage III. All had undergone total abdominal hysterectomy and bilateral salpingo-oophorectomy. Two of these patients received additional chemotherapy and 1 radiotherapy. After 3, 3, 8 and 4 years there were no recurrences in these patients, in contrast to a 29.1% 5-year survival rate for the other patients with serous carcinoma. Cytological examination of ascitic fluid specimens performed in 3 of the 4 patients with PPPN demonstrated the presence of highly differentiated serous tufted cells.