Multi-Institutional Registry of Large Bowel Cancer in Japan Conducted by the Japanese Society for Cancer of the Colon and Rectum in 2024: Cases Treated in 2016.

OBJECTIVES

Colorectal cancer is the most common malignant disease in Japan. This study aimed to publish data on colorectal cancer cases registered in 2024, focusing on patients who received initial treatment in 2016.

METHODS

Participating facilities of the Japanese Society for Cancer of the Colon and Rectum (JSCCR) registered cases treated in 2016 according to the 8th edition of the Japanese Classification of Colorectal Carcinoma. Data submitted to the National Registration Committee in 2024 were analyzed.

RESULTS

A total of 12,825 cases were analyzed. Of these, 1,091 patients underwent endoscopic treatment, 756 underwent additional surgical resection after endoscopic treatment, and 10,806 underwent surgical treatment. Notably, among patients treated endoscopically, the proportion of endoscopic submucosal dissection (ESD) cases increased from 10.1% in 2010 to 25.5% in 2016.

CONCLUSIONS

This report describes the characteristics, treatment methods, and outcomes of colorectal cancer patients receiving initial treatment in 2016 at JSCCR-affiliated facilities. Notably, the proportion of cases with ESD among all endoscopic procedures increased by more than twofold between 2010 and 2016. These data are expected to be useful for patients to better understand their disease and for healthcare professionals when explaining colorectal cancer and its treatments to patients.