[Clinical analysis of 7 cases of parovarian borderline tumors].

Seven cases of primary parovarian borderline tumors are presented, Comprising 1.6% of 451 cases of parovarian cysts treated. The age range of the 7 cases was from 16 to 60, with a mean value of 37 years. Abdominal mass, lower abdominal pain or discomfort were chief clinical complaints. In one case, because of amenorrhea of 2 months' duration, the preoperative diagnosis was mistaken to be extra-uterine pregnancy. Surgical examination revealed normal appearance of ovaries and fallopian tubes. Smooth-surfaced cystic masses arising from the broad ligaments were found in all of the 7 cases, their size ranged from 3cm x 2cm x 1.5cm to 8cm x 8cm x 7cm. Internal papillary projections single or multiple, and clear serous fluid were seen in all of the 7 cystic specimens. Microscopically the cyst wall and papillary projections were lined with stratified cuboid or columnae epithelium. Abundant and complicated ramifications of the projections were seen. The nuclei showed slight to moderate metaplasia; mitoses were rare. 6 of the cases originated from paramesonephros and 1 ease was of mesonephric origin. The seven patients were living and well during a postoperative follow-up period of 12 months to 11 years. Literature review on primary parovarian borderline tumors, their clinical presentation, pathological characteristics, therapy and prognosis are presented and discussed.