Histopathological and genetic differences between polypoid and non-polypoid submucosal colorectal carcinoma

Table 1 The size of submucosal invasive carcinomas in the PG and NPG groups

Groups (n)	Size (mean ± SD) (mm)
PG (60)	13.5 ± 5.4
NPG (36)	7.5 ± 6.2b

^bP < 0.001 vs PG group (Student’s t test).

Table 2 Histological comparison of sm invasive carcinomas between the PG and NPG groups

	PG( %)	NPG (%)
Histologial features
Differentiation
Well differentiated	73.3	50a
Moderate differentiated	26.7	50
Invasive depth
Sm 1	56.7	36.7
Sm 2-3	43.3	64.3b
Lymph node metastasis
Positive	6.7	42.9d
Negative	93.3	57.1

^aP = 0.238 vs PG group (Fisher’s exact test),

^bP = 0.004 vs PG group (Fisher’s exact test),

^dP = 0.008 vs PG group (Fisher’s exact test).