Reduction of the incidence and mortality of rectal cancer by polypectomy: a prospective cohort study in Haining County

Table 2 Pathologic features of initial polyps of two groups of high-risk populations

Pathologic Diagnosis	First group		Second group		Total
	n	%	n	%	n	%
Adenoma	1485	52.88	876	69.47	2361	58.02
Tubular	1352	48.15	843	66.85	2195	53.94
Tublovillous	104	3.70	31	2.46	135	3.32
Villous	19	0.68	2	0.16	21	0.52
Non-adenomatus	1326	47.22	382	30.29	1708	41.98
Mucosal	596	21.23	95	7.53	691	16.98
Juvenile	183	6.52	95	7.53	278	6.83
Hyperplastic	113	4.02	72	5.71	185	4.55
Inflammatory	90	3.21	4	0.32	94	2.31
Schistosomiais	326	11.61	115	9.12	441	10.84
Lymphoid	10	0.36	1	0.08	11	0.27
Other	8	0.28	0	0.00	8	0.20
No pathologic diag	7	0.25	3	0.24	10	0.25
Total	2815		1261		4076