Moreover, studies on the role of PDGF-A in cancer, including autocrine growth regulation in the cancer cells themselves, as well as the paracrine recruitment of tumor stroma (reviewed in [33], and the involvement of PDGF-A in tissue fibrosis (reviewed in [32]) will benefit from more precise information about the endogenous PDGF-A expression patterns in both normal and pathological situations. This evidence concerns the gene PDGFA and cancer.