Predictors for malignant potential and deep submucosal invasion in colorectal laterally spreading tumors

Table 1 Characteristics of the patients and lesions

	Total
Number of patients	323
Male sex, n (%)	181 (56.0)
Age, mean ± SD, yr	64.7 ± 10.5
Number of lesions	341
Size, median (IQR), cm	2.0 (1.5-3.0)
Location, n (%)
Caecum and ascending colon	137 (40.2)
Transverse colon	42 (12.3)
Descending colon	22 (6.5)
Sigmoid	45 (13.2)
Rectum	95 (27.9)
LST subtype, n (%)
G-NM	152 (44.6)
G-H	61 (17.9)
NG-PD	62 (18.2)
NG-FE	66 (19.4)
HGD/carcinoma, n (%)	204 (59.8)
Carcinoma in situ, n (%)	173 (50.7)
SMI, n (%)	31 (9.1)
Deep SMI, n (%)	12 (3.5)
Endoscopically unresectable, n (%)	16 (4.7)

LST: Laterally spreading tumor; G-NM: Granular nodular mixed; G-H: Granular homogenous; NG-FE: Non-granular flat elevated; NG-PD: Non-granular pseudodepressed; IQR: Interquartile range; SMI: Submucosal invasion.