Extension code 60 Adjacent organs
Liver from ascending
Stomach from transverse
Small intestine from sigmoid
Skeletal muscle of pelvic floor from rectum
Code 60 indicates that the primary tumor has contiguous extension to adjacent organs. Adjacent organs differ for the subsites of the colon, the rectosigmoid, and the rectum. Examples shown on the slide include 1) direct extension of tumor from the ascending colon to the liver; 2) direct extension from the transverse colon to the stomach; 3) direct extension from the sigmoid colon to the small intestine; and 4) direct extension from the rectum to the skeletal muscle of the pelvic floor.