PSA and PSMA mRNA were expressed in both CTCFAPα and CTCEpCAM, suggesting these cells originated from the prostate tumor environment as PSMA and PSA mRNA expression is observed in normal prostate, hyperplastic, and invasive prostate carcinomas.32 CTCFAPα were also stained with a fluorescently-labeled PSMA mAb, which confirmed the presence of this protein. This evidence concerns the gene FOLH1 and prostate neoplasm.