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Gynecol Minim Invasive Ther. 2019 Oct 24;8(4):179-184. doi: 10.4103/GMIT.GMIT_85_18. eCollection 2019 Oct-Dec.

Extragonadal Giant Endometrial Cyst with Endometrioid Borderline Tumor.

Author information

1
Department of Obstetrics and Gynecology, Fukushima Red Cross Hospital, Fukushima, Japan.
2
Department of Obstetrics and Gynecology, Ohta Nishinouchi Hospital, Fukushima, Japan.

Abstract

We describe an extremely rare case of a borderline tumor arising from an extragonadal giant endometrial cyst. A 41-year-old woman complaining of abdominal pain was referred to our hospital with a diagnosis of large ovarian tumor. Magnetic resonance imaging revealed a large cystic tumor approximately 27 cm × 9 cm in area. The cyst contents were largely removed by suction, and then the tumor was resected laparoscopically. Both adnexa were normal in size and location. The tumor did not originate from the ovaries, and it was adherent only to the bilateral uterosacral ligaments and uterine body. The postoperative histopathological evaluation confirmed the presence of endometrioid borderline tumor with transition from endometriosis. Staging laparotomy was performed, and no remnant tumor was detected. This case is extremely unusual because such a large cystic tumor originating from extragonadal endometriosis is very rare, as is endometrioid borderline tumor arising from endometriosis.

KEYWORDS:

Atypical endometriosis; endometrioid borderline tumor; endometriosis-related ovarian neoplasm; extragonadal endometriosis

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