Analysis of endoscopic features for colorectal sessile serrated adenoma/polyp / 中华消化内镜杂志

ABSTRACT

Objective To evaluate the endoscopic features of colorectal sessile serrated adenoma/polyp(SSA/P). Methods The data of 109 cases of SSA/P and 218 cases of polyps randomly selected in Xijing Hospital from January 2014 to December 2016 were collected. The endoscopic features of SSA/P and polyps were compared, and the risk factors of occurrence and cancerization of SSA/P were analyzed. Results The mean age of patients in the SSA/P group was older than that of polyps group(P=0.011).The distribution of lesions was no significant difference between the two groups(P=0.092). The gross type of SSA/P was mainly type Ⅰ and Ⅱ, while polyps were more in type Ⅰ(P=0.036). According to the pit pattern of Kudo,type Ⅱ was more in SSA/P,but types Ⅰ and Ⅱ were more in polyps(P=0.004). For capillary pattern comparison,type Ⅱ was more in SSA/P,but type Ⅰ was more in polyps(P≤0.000 1). For surface morphological features comparison,the SSA/P group was more likely to be observed the mucous cap(P=0.002)and blood vessel thickening(P=0. 004). On pathologic diagnosis, the SSA/P group was more susceptible to atypia and carcinogenesis(P = 0.001). Higher microvascular morphological classification,being mucous cap,and blood vessel thickening were risk factors of atypia and carcinogenesis of SSA/P. Conclusion There were significant differences between SSA/P and polyps on lesion location,pit pattern,capillary pattern,surface structure characteristics,and risk factors of atypia and carcinogenesis.