[Peritoneal serous borderline tumors: report of two cases]

Two cases of serous borderline tumors of the peritoneum are reported. These rare tumors may show variable histological features. The lack of peritoneal invasion, which may be difficult to assess, with minimal or no ovarian involvement are major features for the diagnosis. These tumors should be distinguished from other peritoneal neoplasms such as serous carcinomas because of their good prognosis after surgical therapy alone.