Serous Borderline Tumor of the Fallopian Tube: A Case Report and Literature Review

Paratubal cysts account for 5-20% of all adnexal lesions. Malignant modifications seldom arise in the paratubal cysts that are usually known as primary carcinomas of fallopian tube. Paratubal borderline tumors are very infrequent conditions and until now only sixteen cases of primary paratubal borderline tumors have been previously reported in the literature. Herein, we describe a rare paratubal serous borderline tumor occurring in a woman of reproductive age and provide insights into its management. A 32-year-old woman referred to Imam Hussein Hospital, Tehran with chief complaint of amenorrhea for the last year and transvaginal sonography (TVS) report indicating a 68×74 mm persistent right adnexal cyst from 10 months ago. The patient was candidate for laparotomy and due to the report of paratubal serous borderline tumor in frozen section she underwent right total salpingectomy and infracolic omentectomy. No evidence of recurrence or metastasis was observed after 3 years of follow up. Persistent adnexal cysts need to be evaluated precisely even in young women in order to rule out the malignancy of fallopian tubes.