JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY
Online ISSN : 1884-5746
Print ISSN : 1884-9938
Case report
Laparoscopically resected mesothelial cyst mimicking a urachal cyst
Atsuko SakakibaraTadayoshi NaganoMari UjitaYusuke ButsuharaHiromi MiyataHiroko YoshikawaNatsuki TsujiErika KumakuraKoichi TerakawaYoshiaki Yuba
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JOURNAL FREE ACCESS

2012 Volume 28 Issue 1 Pages 398-402

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Abstract
Objective: To report a rare case of a mesothelial cyst in the lower abdominal extraperitoneal space, mimicking a urachal cyst.
Case: A 43-year-old nulligravid female complained of lower abdominal pain, ongoing for about 6 months. Physical examination revealed a pelvic mass reaching the height of the umbilicus. Magnetic resonance imaging showed a 15 × 6 cm cystic tumor in addition to a uterine leiomyoma and an ovarian endometriotic cyst. Laparoscopic surgery revealed that the huge cystic tumor extended into the lower abdominal extraperitoneal space, similar to a urachal cyst, and was adherent to the ovarian endometriotic cyst. The resected tumor was diagnosed pathologically as a mesothelial cyst.
Conclusion: Mesothelial cysts occur most frequently in the peritoneal cavity of reproductive-aged women and are often accompanied by endometriosis. Endometriosis is often associated with pelvic peritoneal defects. This report suggests that a mesothelial cyst may extend into the lower abdominal extraperitoneal space through a peritoneal defect caused by endometriosis.
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© 2012 Japan Society of Gynecologic and Obstetric Endoscopy and Minimally Invasive Therapy
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