[Questionnaire Survey on Adjuvant Chemotherapy for Colorectal Cancer in Yamaguchi Prefecture]

A questionnaire survey on postoperative chemotherapy for colorectal cancer was conducted in 22 hospitals in Yamaguchi Prefecture. Adjuvant chemotherapy was performed in<95% of Stage Ⅲ cancer, and oxaliplatin(OX)combination therapy was selected depending on the risk of recurrence. However, the proportion of OX combination therapy was lower than that in other prefectures, which was 24% in Stage Ⅲa, 44% in Ⅲb, and 76% in Ⅲc. In addition, among the OX combination therapy regimens(FOLFOX or CAPOX), the proportion of FOLFOX administration was higher in Yamaguchi Prefecture than in other prefectures. In Stage Ⅱ, most hospitals set up high-risk factors for recurrence and underwent adjuvant chemotherapy. FU-based monotherapy was selected in 80% of hospitals. A few hospitals decided the requirement of OX combination therapy based on age alone. In Yamaguchi Prefecture, the indication of postoperative adjuvant chemotherapy for colorectal cancer was almost standard; however, the rate of administering OX combination therapy was low.