下行結腸に浸潤し潰瘍を形成した後腹膜脂肪肉腫の1例

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  • A CASE OF RETROPERITONEAL LIPOSARCOMA INFILTRATED INTO THE DESCENDING COLON AND FORMED AN ULCER

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We encountered a patient with a huge retroperitoneal liposarcoma that infiltrated into the descending colon and formed an ulcer.<br> A 77-year-old man was admitted to the hospital because of bloody stool, fever and general weakness. On abdominal ultrasonography and abdominal CT, a tumor pressing the pancreas, left kidney and colon was detected in the left retroperitoneal cavity. Leakage of contrast medium from the descending colon was observed on a barium-enema study, indicating that an ulcer was formed due to tumor infiltration. On examination of the excised specimen, the tumor measured 10×11×10cm and the internal tissue was necrotized. The ulcerative tumor infiltrated into the descending colon, forming a fistula. The tumor was histologically typed as mixed liposarcoma.<br> Retroperitoneal liposarcoma is discovered as a huge mass in many cases, and thus associated resection is frequently demanded due to infiltration into and compression of other organs. However, it is rare that the tumor infiltrates into the colon, forming an ulcer. Therefore, we report this case with a review of the literature.

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