PRIMARY MESENTERIC LIPOSARCOMA: A CASE OF A LARGE INTRA-ABDOMINAL ENCASING THE SIGMOID COLON

Objectives: Liposarcomas are malignant tumors of adipocytes that commonly present as large deep-seated masses in the connective tissue space of the extremities or retroperitoneum. A primary mesenteric intraperitoneal liposarcoma is a very rare subtype. ​We report the case of a 67 year old white male with a well-differentiated MDM2 positive liposarcoma of the sigmoid colon mesentery. The patient clinically presented with vague symptoms of abdominal pain. CT imaging revealed a large homogenous mass extending throughout the abdomen and surrounding the sigmoid colon. We elected to perform a laparotomy and a 20.1 × 15.2 × 4.8 cm tumor arising from the mesentery was identified with encasement of a 19.5 cm segment of the sigmoid colon. We resected the tumor and sigmoid colon en bloc and performed an end-to-end anastomosis. The patient recovered well with no complications. Complete resection is curative for most liposarcomas, although the role of adjuvant therapy and surveillance protocols need to be further elucidated for primary mesenteric liposarcomas.

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