FAP and Familial adenomatous polyposis: Similarly, for FFPE tissues, lower ERβ2 mRNA expression levels were found in FAP polyps (p < 0.05; Mean Diff 2.944; q = 4.393; 95% CI 0.6458 to 5.243) and sporadic polyps (p < 0.05; Mean Diff 2.438; q = 3.945; 95% CI 0.3186 to 4.557) compared with FAP mucosa.