[Hepatic arterial infusion (HAI) chemotherapy achieved a complete response (CR) for multiple liver metastases of colorectal cancer--two case reports].

We encountered two cases of concurrent multiple liver metastases of colorectal cancer in two patients who achieved a complete response (CR) to hepatic arterial infusion (HAI) chemotherapy. The first case is a 64-year old man who was found to have anemia, and a diagnosis of ascending colon cancer was made. There were 6 metastatic lesions in both lobes of the liver. A right hemicolectomy was performed. Postoperative chemotherapy consisted of 2 g of oral UFT-E as well as 3 mg of CDDP and 500 mg of 5-FU administered by HAI. The metastatic lesions disappeared after 9 courses of chemotherapy were carried out. A partial hepatectomy was performed in the scarred area. Histopathological examination revealed no cancer cells. No recurrence has been observed for 4 years and 10 months since achieving CR. The second case is a 69-year-old man who had thin stool and bloody stool. Rectal cancer was diagnosed. Five metastatic lesions were noted in both lobes of the liver. A low anterior resection was performed. l-LV 25 mg and 5-FU 500 mg were given postoperatively by HAI. After three courses of chemotherapy postoperatively, metastatic lesions disappeared. No recurrence has been noted for 2 years and 1 month since achieving CR. HAI chemotherapy is considered one of the useful treatment options for patients with multiple liver metastases of colorectal cancer.