A CASE OF PROLIFERATIVE FASCIITIS PRESENTING AS A RETROPERITONEAL TUMOR

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  • 後腹膜腔に発生した増殖性筋膜炎の1例

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Abstract

Proliferative fasciitis has been reported as a rare disease and its retroperitoneal occurrence is quite rare.<br> A 51-year-old man was admitted to the hospital because of a painless hard tumor in his right hypogastrium. Abdominal CT scan showed a 9cm-sized retroperitoneal tumor which was adjacent to the right iliopsoas muscle and displaced the cecum. A malignant tumor of the retroperitoneum was suspected and laparotomy was performed. The tumor 11cm in diameter was present in the retroperitoneum involving the ureter and invading the iliopsoas muscle. The removal of the tumor with right ureterectomy was performed. The tumor was diagnosed as proliferative fasciitis histologically and immunohistochemically. Proliferative fasciitis commonly occurs in the extremities, and in a benign disease characterized by the appearance of ganglion-like cell. Some spontaneously involuted cases have been reported. But the retroperitoneal occurrence of the disease like in this case is quite rare, and we consider the case is interesting.

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