RT Journal Article SR Electronic T1 Laparoscopically Removed Streak Gonad Revealed Gonadoblastoma in Frasier Syndrome JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 3975 OP 3979 VO 37 IS 7 A1 HASHIMOTO, KAZUNORI A1 HORIBE, YU A1 EZAKI, JIRO A1 KANNO, TOSHIYUKI A1 TAKAHASHI, NOBUKO A1 AKIZAWA, YOSHIKA A1 MATSUI, HIDEO A1 YAMAMOTO, TOMOKO A1 SHIBATA, NORIYUKI YR 2017 UL http://ar.iiarjournals.org/content/37/7/3975.abstract AB Background: Frasier syndrome (FS) is characterized by gonadal dysgenesis and progressive nephropathy caused by mutation in the Wilm's tumor gene (WT1). We report a case of FS in which diagnosis was based on amenorrhea with nephropathy, and laparoscopically-removed streak gonad which revealed gonadoblastoma. Case Report: At the age of 3 years, the patient developed nephrotic syndrome. This later became steroid-resistant and, by the age of 16 years, had progressed to end-stage renal failure with peritoneal dialysis. At the age of 17 years, the patient presented primary amenorrhea and was referred to our department. Physical examination was consistent with Tanner 1 development and external genitalia were female phenotype. Speculum examination showed uterine cervix and uterine body and bilateral ovaries were not palpable on pelvic examination. Multi-sliced computed tomography of abdomen and pelvis revealed streaked structure along the bilateral external iliac artery at pelvic wall and hypoplastic uterus. Serum testing revealed primary hypogonadism pattern, elevated follicle-stimulating hormone and luteinizing hormone with low concentrations of estradiol and testosterone. The patient underwent genetic counseling with her parents. Chromosomal status was 46XY karyotype and DNA sequencing confirmed FS due to a heterozygous WT1 mutation (IVS9+5G>A). Elective laparoscopic bilateral salpingo-oophorectomy was performed to avoid increased risk for gonadoblastoma. Pathological examination revealed gonadoblastoma in the right gonad. Conclusion: Although a rare disease, the diagnosis of FS should be considered in the case of primary amenorrhea with nephropathy. Prophylatic gonadectomy is recommended due to the high risk of gonadoblastoma in the dysgenetic gonad.