Abstract
A 65-year-old woman visited our hospital with a right lower quadrant abdominal tumor. Enhanced CT revealed a 7-cm tumor in the ascending colon, a 4-cm tumor in front of the right iliopsoas muscle, and para-aortic lymph node enlargement. Colonoscopy showed an elevated lesion, like a submucosal tumor, in the ascending colon. The preoperative diagnosis was malignant lymphoma or extramurally growing ascending colon cancer, and right hemicolectomy was performed. The histopathological diagnosis was inflammatory myofibroblastic tumor, which was composed of myofibroblast-like spindle shaped cells and associated with inflammatory cell infiltration. Seven months after the first operation, enhanced CT showed multiple intra-abdominal tumors. We suspected reccurence of IMT, and decided to perform surgical resection of the tumor. The histopathological diagnosis was recurrence of IMT. Although IMT is usually a low-grade malignancy with a good prognosis after surgical treatment, local recurrences have been reported. Therefore, regular follow-up of the patients is important for early diagnosis of recurrence.
