A total expression score for estrogen receptors both in basaloid and hepatoid cells reached 5.96 ± 2.14 in the adenoma group, 5.42 ± 2.50 in the epithelioma group and 2.40 ± 2.88 in the carcinoma group and the differences were significant between the adenoma and carcinoma groups (p = 0.04; Table 1 and Figure 3). This evidence concerns the gene ESR1 and adenoma.