Pathology Discovery

Pathology Discovery

ISSN 2052-7896
Case report

A case of benign cystic mesothelioma arising from the lesser omentum in a 13-year-old girl treated through a laparoscope excision

Kenji Niwa1*, Ryu-ichiro Yano2, Yoko Ueda3, Motoki Takenaka3, Sakae Mori4, Yoshio Yamaguchi4, Tsuneo Ishihara1 and Takuji Tanaka5

*Correspondence: Kenji Niwa

1. Department of Obstetrics & Gynecology, Gujo City Hospital, 1261 Shimadani, Gujo City 501-4222, Japan.

Author Affiliations

2. Department of Obstetrics & Gynecology, Takayama Red Cross Hospital, 3-11 Ten-man-cho, Takayama City 506-8550, Japan.

3. Department of Obstetrics & Gynecology, Gifu University School of Medicine, 1-1 Yanagido, Gifu City 501-1194, Japan.

4. Section of Laboratory Medicine, Gujo City Hospital, 1261 Shimadani, Gujo City 501-4222, Japan.

5. Department of Diagnostic Pathology & Research Center of Diagnostic Pathology, Gifu Municipal Hospital, Gifu City 500-8513, Japan.


Benign cystic mesotheliomas (BCMs) are extremely rare tumors usually occurring in females of reproductive age. A 13-year-old Japanese girl presented with abdominal pain, and an adnexal cystic tumor was suggested by images. At laparoscopy, the cystic mass was found arising from the lesser omentum. Histological examination and calretinin-immunohistochemistry revealed the lesion as a BCM. Cytology was initially useful for the diagnosis. This is a benign pathology, but recurrences are not uncommon. BCM should be included in the differential diagnosis, when investigating pelvic and abdominal masses associated with adnexal tumors in women.

Keywords: Benign cystic mesothelioma, omental tumor, cytology, calretinin

ISSN 2052-7896
Volume 5
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