FLT1 and thyroid gland carcinoma: Others RTKs: Copy number gains in several other RTKs [epidermal growth factor receptor (EGFR), platelet-derived growth factor receptor A/B (PDGFRA/B), vascular endothelial growth factor receptor 1,2 (VEGFR1,2), Mast/Stem Cell Growth Factor Receptor Kit (c-KIT) and MET Proto-Oncogene, Receptor Tyrosine Kinase (MET)] have been identified in different subtypes of thyroid cancer [25,31,52].