Table 1.

Characteristics of patients with multiple primary colorectal cancers

^*values are mean (range); other values in parentheses are percentage. ^†right-side colon, which included appendix, cecum, ascending colon, hepatic flexure, and transverse colon, ^‡left-side colon, which included splenic flexure, descending colon, and sigmoid colon, ^§number of concurrent synchronous lesion (n=20), and second metachronous lesion (n=9).