SNAI1 and neoplasm: Epithelial-Mesenchymal Transition (EMT) is a process that promotes tumor progression; Snail (snail1) transcription factor is a C2H2 zinc finger protein that promotes EMT, which is characterized by decreased expression of cell adhesion molecules such as E-cadherin, VE-cadherin, Claudins, Occludin, Desmoplakin, Cytokeratins, and Mucin-1, and increased expression of mesenchymal markers such as vimentin and N-cadherin [3], [4].