Colon and Rectum Histologies
95 percent of cases are adenocarcinoma*
ICD-O-3 codes 814-838
8210/3 adenocarcinoma in adenomatous polyp
8220/3 adenocarcinoma in adenomatous polyposis coli
8261/3 adenocarcinoma in villous adenoma
*Per Colorectal Cancer Facts & Figures Special Edition 2005; American Cancer Society
According to the American Cancer Society publication, Colorectal Cancer Facts & Figures Special Edition 2005, the histology of 95% of colon/rectum cancer cases is adenocarcinoma. According to ICD-O-3, histology with the first 3 digits 814 through 838 is classified as adenoma and adenocarcinoma. Common histology for colon and rectum that is categorized as adenocarcinoma includes adenocarcinoma, NOS, adenocarcinoma in adenomatous polyp, adenocarcinoma in adenomatous polyposis coli, and adenocarcinoma in villous adenoma.