| Summary: | Multiple mesenteric well-differentiated (WD) liposarcoma is an extremely rare entity. The present study describes a case of multiple mesenteric WD liposarcoma, complicated by purulent inflammation, in a 59-year-old male who presented with abdominal pain and pyrexia of unknown origin. A computed tomography scan of the abdomen revealed a large, non-encapsulated mass in the abdomino-pelvic cavity, which was characterized by two components, a main portion of fatty density and a non-adipose solid portion. A re-evaluated CT scan, performed eight days later, revealed an enlargement of the non-adipose mass. A laparotomy was performed, and numerous separated fatty nodules and masses of various sizes were identified within the mesentery of the small intestine. The histological findings were consistent with an adipocytic subtype of multiple mesenteric WD liposarcoma, with the largest of the tumors complicated by purulent inflammation. The multiplicity of these tumors and the concurrent purulent inflammation in the present case make it unique.
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