[A Case of Sigmoid Colon Cancer with Long-Term Survival after Retroperitoneal Recurrence, Ovarian Metastasis, and Bilateral Lung Metastasis].

A 65-year-old woman underwent laparoscopically assisted high anterior resection for sigmoid colon cancer in March 2011. The pathological result was S, type 2, 2.5×2.7 cm, tub2, pSE, pN2(#241 5 pts), ly2, v1, fStage Ⅲb. She received UFT+UZEL for 6 months as postoperative adjuvant chemotherapy. She was followed up, but in February 2017, dynamic-CT showed a 24×15 mm left retroperitoneal recurrence, and in the same area, the left ureter was disrupted and the left renal pelvis was dilated. In March of the same year, she underwent 8 courses of FOLFOX+Pmab therapy, and in August of the same year, she underwent left hemicolectomy with left renal complications due to her PR status. After discharge from the hospital, she underwent another 6 courses of FOLFOX+Pmab therapy. She was switched to oral administration of S-1, which was continued for 1 year. However, in November 2019, a right ovarian metastasis appeared, and right ovarian resection was performed. In July 2022, multiple bilateral lung metastases appeared on a CT scan, and 5 courses of FOLFIRI+Bmab were performed. Subsequently, she was followed up without chemotherapy at her request. Thirteen years after the initial surgery, there has been no apparent recurrence on imaging, and the patient is alive.