Another study [33] analyzed whole blood samples from 76 CRPC patients, treated by maximum androgen blockage, in order to detect circulating tumor cells (CTCs) and methylated DNA (using qMSP) for a five-gene candidate marker panel (GSTP1, APC, PTGS2, MDR1 and RASSF1A). The gene discussed is GSTP1; the disease is neoplasm.