FOXO3 and neoplasm: Forkhead homeobox type O3a (FOXO3a, FKHRL1) is also a transcription factor with known tumor suppressor activity and belongs to the family of mammalian forkhead transcription factors, which are regulated by growth factor receptor-induced activation of the phosphatidylinositol 3-kinase (PI3-K)/Akt (or protein kinase B) signaling pathway [11].