Sequencing results revealed that RASSF1A was highly methylated (90%; n = 27) with a mean methylation density of 73.7 ± 24.9% (20–100%), and 77% (N = 23) of the adenomas were methylated at ≥50% of the CpG sites; 2 adenomas had a methylation density of 8% and 9% and one adenoma sample was not methylated at any site. Here, RASSF1 is linked to adenoma.