Sunitinib (SU11248) is an orally bioavailable inhibitor that affects the receptor tyrosine kinases involved in tumour proliferation and angiogenesis, including vascular endothelial growth factor (vegf) receptors 1, 2, 3, and platelet-derived growth factor receptors alpha (pdgfra) and beta (pdgfrb). The gene discussed is PDGFRB; the disease is neoplasm.