Frequent expression of AR in mucinous carcinomas was previously reported; de Andrade Natal et al. reported that AR positivity was seen in 5 of 16 cases (31.6%) of type A breast mucinous carcinomas and 13 of 23 cases (56.5%) of type B breast mucinous carcinomas [6]. This evidence concerns the gene AR and mucinous adenocarcinoma.