[A Case of Locally Recurrent Tumor Resected by Left Hemicolectomy with Left Nephrectomy Six Years after Curative Operation for Sigmoid Colon Cancer].

A 65-year-old woman underwent high anterior resection for sigmoid colon cancer in 2011. The histopathological diagnosis was type 2, 25×27 mm, tub2, SE, N2, ly2, v1, and Stage Ⅲb. Her treatment was completed after 6months of adjuvant chemotherapy with UFT plus UZEL followed by a 5-year follow-up study, without recurrence. However, 6years after the initial operation, a routine chest and abdominal CT scan showed a 24mm local recurrence involving the left urinary tract and bilateral lung lesions. Eight courses of systemic chemotherapy using FOLFOX plus panitumumab regimen was administered immediately. CT scan after chemotherapy showed that all masses were downsized and no new lesions were identified. We resected the recurrent tumor after considering it feasible by left hemicolectomy with left nephrectomy. Histopathological examination of the recurrent tumor revealed adenocarcinoma, consistent with that of the previous primary sigmoid colon cancer. She is currently undergoing systemic chemotherapy using the FOLFOX regimen. There has been no change in the lung lesions and no new lesions have developed. This is a very rare case of recurrence more than 5 years after curative resection of Stage Ⅲ colon cancer. This paper presents the case considering that keeping the patient under surveillance for more than 5 years enabled the disclosure of recurrence without subjective symptoms.