The Coexistence of Colorectal Polyps in the Right Colon Increases the Malignant Risk of Laterally Spreading Tumors

Table 3

Factors associated with malignant LSTs in the polyp group.

		Nonmalignant ()	Malignant ()	value
Gender				0.987
Male	76	60	16
Female	43	34	9
Age (year)				0.365
≤49 or ≥76	20	14	6
50–75	99	80	19
Location of colorectal polyps				0.022
Right colon	29	20	9
Left colon	35	29	6
Rectum	18	13	5
Right colon+left colon	9	6	3
Right colon+rectum	3	2	1
Left colon+rectum	2	2	0
3 sites	23	22	1
Polyp size (cm)				0.973
<1	86	68	18
≥1	33	26	7
Number of polyps				0.926
≤2	80	63	17
≥3	39	31	8
LST size (cm)				0.001
<2	37	34	3
<3	39	33	6
<4	32	23	9
<5	2	0	2
≥5	9	4	5
Location of LSTs				0.173
Ileocecal valve	17	16	1
Ascending colon	30	25	5
Hepatic flexure	8	5	3
Right transverse colon	8	6	2
Left transverse colon	23	19	4
Splenic flexure	1	1	0
Descending colon	6	3	3
Sigmoid colon	10	9	1
Rectum	16	10	6
Morphological type				0.012
G-H	15	13	2
G-M	45	30	15
NG-FE	36	34	2
NG-PD	23	17	6
Pathomorphism				0.113
Hyperplastic	9	9	0
Tubular	90	72	18
Tubulovillous	12	7	5
Serrated adenoma	8	6	2
History of polyps				0.362
No	57	43	14
Yes	62	51	11