FLNB and neoplasm: Another study detected both Filamin A and Filamin B in the plasma from men with suspected PCa.46 Recently, the role of Filamin A has been mentioned as a new tumor suppressor gene for colorectal adenocarcinoma.47 In the present study, by proteomic analysis of exosomes, we observed a higher level of Filamin A in African American PCa patients compared with Caucasian patients.