Chicken skin mucosa surrounding small colorectal cancer could be an endoscopic predictive marker of submucosal invasion

Table 4 Comparison of morphological characteristics and invasion depth of early colorectal cancer under white light endoscopy, n (%)

Endoscopic finding	SM (37)	M (196)	P value
(All) CSM	22 (59.5)	51 (26.2)	< 0.001
(All) Ulceration or errhysis	10 (27.3)	8 (4.1)	< 0.001
(All) Demarcated depressed area	17 (46)	17 (8.7)	< 0.001
(All) Deeper red mucosal color	26 (70.3)	130 (66.3)	0.354
(P, S) Loss of lobulation	5/15 (33.3)	30/145 (20.7)	0.323
(P) Stalk swelling	6/11 (54.6)	12/87 (13.8)	0.04
(F) Fold convergency	2/49 (4.1)	4/12 (33.3)	0.11
(P, S) Fullness	28/147 (19)	8/25 (32)	0.14

CSM: Chicken skin mucosa; SM: Submucosal; M: Mucosal.