We here present data on mRNA expression level of the complete PDGF family, i.e. PDGFA, PDGFB, PDGFC, and PDGFD as well as their receptors, measured by TaqMan qRT-PCR in five non-neoplastic human thyroid tissues, ten differentiated (classic) and eight clinically aggressive papillary thyroid carcinomas, the latter including seven tumours with histologic evidence of poorly differentiation. The gene discussed is PDGFC; the disease is differentiated thyroid carcinoma.