抄録
A 16-year-old female patient presented with chief complaints of secondary amenorrhea for 7 months and low abdominal mild pain. Magnetic resonance imaging, computed tomography, and ultrasonography showed a polycystic tumor of the right ovary about 5 cm in diameter with slight septal thickening and a thickening of the endometrium. The thickening of the endometrium persisted until the first surgical procedure. A benign ovarian cyst was diagnosed, with a mucinous cyst adenoma the most likely diagnosis. She underwent a laparoscopic cystectomy. The histopathologic examination revealed a granulosa cell tumor (adult type) . Post-operative magnetic resonance imaging after showed no evidence of recurrence. A laparoscopic oophorectomy was performed 4 months after the first operation, at which time no recurrent lesions were identified. The residual right ovary had no granulosa cell tumor on histopathologic findings. No adjuvant treatment was administered. After the first operation, the patient's menstrual cycles became regular. She is alive and well 2 years after the second surgery with no evidence of recurrence.
A polycystic ovarian tumor and abnormal menstruation, especially with persistent thickening of the endometrium, is possibly a granulosa cell tumor. In such a case, a laparotomy, not a laparoscopy, is the operative method of choice.
