Tumors of the Fimbriated End of the Fallopian Tube: A Clinicopathologic Analysis of 20 Cases, Including Nine Carcinomas

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SummaryTwenty tumors that were primary in the tubal fimbriae are reported. They were found in patients aged 17 to 83 (average 57) years. All were of mullerian type. Nine tumors were benign (eight adenofibromas, one cystadenoma), of which seven were serous and two, endometrioid. Two tumors were borderline, a serous papillary cystic tumor of borderline malignancy and an endometrioid adenofibroma of borderline malignancy. Nine tumors were carcinomas, of which four were serous, three endometrioid, and two undifferentiated. Follow-up information was available for six patients with carcinoma. One with serous carcinoma was well at 1 year; a second had ascites with malignant cytologic features nine years postoperatively and is currently on chemotherapy. One patient with endometrioid carcinoma was alive without disease after 8 years, and the other died of tumor at 6.5 years. One patient with undifferentiated carcinoma was alive without disease at 5 years and the other died of disease at eight months. The occurrence of fallopian tube tumors that arise in the fimbriae has received scanty attention in the literature. A fimbrial origin for the tumors is often overlooked initially. Carcinomas confined to the fimbriae cannot be adequately staged according to the current staging system of the International Federation of Gynecology and Obstetrics. It is proposed that they be placed in a new category, Stage I(F), because the tumor cells are exposed directly to the peritoneal cavity even though they do not invade the tubal wall. Although experience is limited it appears that they may have a worse prognosis than Stage I tubal tumors that are nonfimbrial.

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