Table 3.

Anatomical sites of tumors presenting in early- and late-onset colorectal cancer patients in 2008-2019

Tumor sites	< 50-years-old, n (%)	≥ 50-years-old, n (%)	Total, n (%)
Right side	45 (22.0)	67 (23.1)	112 (22.6)
Cecum	13 (6.3)	17 (5.9)	30 (6.1)
Ascending colon	27 (13.2)	34 (11.7)	61 (12.3)
Hepatic flexure	1 (1.1)	5 (1.2)	6 (1.2)
Transverse colon	4 (2.0)	11 (3.8)	15 (3.0)
Left side	160 (78.0)	223 (76.9)	383 (77.4)
Descending colon	17 (8.3)	9 (3.1)	26 (5.3)
Rectum	84 (41.0)	132 (45.5)	216 (43.6)
Sigmoid	13 (6.3)	42 (14.5)	55 (11.1)
Rectosigmoid	36 (17.6)	38 (13.1)	74 (14.9)
Anus	1 (1.1)	1 (0.2)	2 (0.4)
Anorectal	9 (4.4)	1 (0.3)	10 (2.0)