Multi-institutional Registry of Large Bowel Cancer in Japan Conducted by the Japanese Society for Cancer of the Colon and Rectum in 2023: Cases Treated in 2015.

OBJECTIVES

Colorectal cancer is the most prevalent malignant disease in Japan. This study aimed to publish data on colorectal cancer cases registered in 2023, involving initial treatments in 2015.

METHODS

Participating facilities of the Japanese Society for Cancer of the Colon and Rectum (JSCCR) registered cases treated in 2015 according to the 8th edition of the Japanese Classification of Colorectal Carcinoma. Data sent to the National Registration Committee in 2023 were analyzed.

RESULTS

The study analyzed 12,804 cases. Endoscopic treatments were performed in 983 cases, endoscopic treatment followed by surgical resection in 734 cases, and surgeries were carried out in 10,884 cases. Notably, the proportion of laparoscopic surgeries increased significantly from 34.7% in 2010 to 63.5% in 2015.

CONCLUSIONS

This report details the characteristics, treatment methods, and outcomes of colorectal cancer patients who received initial treatment in 2015 at JSCCR-participating facilities. These data should be helpful for patients to understand their disease accurately and for healthcare professionals to explain colorectal cancer and its treatments to patients.