Benign cyst with xanthogranulomatous inflammation involving the transverse colon and the common iliac artery.

Xanthogranulomatous inflammation (XGI) is a rare process. Colonic XGI is extremely rare. We present a case report of XGI arising within an intra-abdominal cyst involving the transverse colon. A 28-year-old man presented with abdominal discomfort. He underwent a computed tomography abdomen-pelvis, which found three subcutaneous collections and a large cystic intra-abdominal structure. The decision was made for resection. Intraoperatively, the cyst originated from the pelvis and was adherent to the surrounding tissues. Histology from the lesion revealed XGI extending into the surrounding tissue. XGI is a rare inflammatory condition. Clinically, it can be difficult to distinguish XGI from an infiltrative malignancy. Therefore, it is usually necessary to obtain a pathological diagnosis of XGI. This case describes an atypical cystic lesion with XGI involving the transverse colon. Although rare, it should be considered in the potential differential diagnosis of an infective or malignant mesenteric cyst.

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