MUC5AC/β-catenin expression and KRAS gene alteration in laterally spreading colorectal tumors

Table 1 Clinicopathological characteristics of laterally spreading tumor of the colorectum

Variable	Gr-type (n = 36)	NGr-type (n = 33)
Age (yr)	68.5 ± 10.9 (34-88)	69.0 ± 10.3 (44-85)
Sex
Male	21	23
Female	15	10
Location
Proximal colon	18	12
Distal colon	18	21
Size of tumor (mm)	35.3 ± 17.9 (12-80)b	23.0 ± 9.1 (10-50)b
Histology
LGD	15	12
Tubular type	11	11
Tubulovillous type	4	1
HGD	12	14
Tubular typed	0	13
Tubulovillous typed	12	1
INV	9	7
Well differentiated type	7	7
Others	2	0

Age and size of tumor are represented as mean ± SD (range); Gr-type: Granular type of laterally spreading tumor; NGr-type: Flat- or non-granular type of laterally spreading tumor; LGD: Adenoma with low grade dysplasia; HGD: Adenoma with high grade dysplasia; INV: Adenocarcinoma invading submucosa; INV-others: Mixed well and moderately differentiated type (n = 1) and mixed well and poorly differentiated adenocarcinoma (n = 1); ^b,dP < 0.01, Gr-type vs NGr-type, tubular type vs tubulovillous type.