Abstract
The patient was a 55-year-old female who visited a physician for chief complaints of fever and right upper abdominal pain. A unilocular cyst with a diameter of 10cm was present in the right abdominal region on abdominal CT. On MRI, a cystic lesion with no high-T2 intensity or solid component of the content and unclear continuity with the intestine was present. The patient was referred to our hospital for surgery.
Laparotomic tumorectomy was performed at our hospital. The tumor was observed in the posterior wall of the omental sac, suggesting its location in the transverse mesocolon. It strongly adhered to the stomach and transverse colon, and also adhered to the abdominal wall and gall bladder through the omentum, for which combined partial resection of the stomach and transverse colon walls was performed.
The specimen was an 11-cm unilocular cyst containing viscous yellow liquid including necrotized debris, and no communication with the stomach or transverse colon was observed. Histopathologically, no intestinal structure or intestinal duplication was observed. Inflammatory cell infiltration was noted in the wall structure, showing reactive changes.
Based on the above findings, the lesion was diagnosed as a giant mesenteric cyst induced by infection. We report the case with a literature review.
