IL17A and dysplasia: The Spearman rank correlation coefficient (non-parametric correlation analysis method) revealed that there was a highly significant correlation (rs = 0.883, P < 0.001, n = 29) between IL-17 expression and the progression of the disease, where the disease progresses stepwise from columnar epithelium to intestinal metaplasia, and onwards towards dysplasia and glandular neoplasia.