Key result
A 69-year-old male with a rare primary undifferentiated pleomorphic sarcoma of the colon mesentery underwent a right hemicolectomy but developed multiple metastases 2 months postoperatively.
Why the study?
Undifferentiated pleomorphic sarcoma commonly involves the extremities and retroperitoneum, but primary presentation in the colon mesentery is very rare.
Case Report (n=1)
Primary UPS of the colon mesentery is a very rare disease that can present as a large abdominal mass and may have a rapid metastatic course despite surgical resection.
An undifferentiated pleomorphic sarcoma (UPS), also known as a malignant fibrous histiocytoma in the past, commonly involves the soft tissue of the extremities and the retroperitoneum. However, a primary UPS of the colon mesentery is very rare. A 69-year-old male patient visited our outpatient department for treatment of an enlarged, palpable mass in the right lower quadrant (RLQ). Computed tomography showed a 15-cm multilobulated, heterogeneous, enhanced mass in the RLQ, which we suspected originated from the colon. He underwent a right hemicolectomy, and the pathologic result was a colon mesenteric UPS. We report a rare case of a primary UPS of the colon mesentery and discuss the characteristics of this neoplasm in reference to the literature.
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Lee et al. (2019) conducted a case report in Primary Undifferentiated Pleomorphic Sarcoma of the Colon Mesentery (n=1). Right hemicolectomy was evaluated. A 69-year-old male with a rare primary undifferentiated pleomorphic sarcoma of the colon mesentery underwent a right hemicolectomy but developed multiple metastases 2 months postoperatively.
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