ABCG2 and prostate neoplasm: In addition to ABCA11, the extra-prostatic tumor stage (pT3 vs pT2) was associated with the down-regulation of other ABC transporter genes from subfamily A (Fig. 2, Additional file 1): ABCA5 (FC 1.73; p = 0.022), ABCA6 (FC 2.00; p = 0.046), and ABCA10 (FC 3.29; p = 0.006).