MYC and adenoma: Serrated lesions have a distinct pathway of progression, and we have recently shown that serrated adenomas retain a stem cell hierarchy, whereas their conventional counterparts do not.20 We therefore examined MYC expression in traditional serrated adenomas (TSAs) (n = 3), sessile serrated adenomas (SSAs)/sessile serrated polyps (SSPs) (n = 6), and HPPs (n = 4).