The molecular processes of mitochondrial dynamics are governed by MFN2 (mitofusin 2), OPA1 (optic atrophy 1), FIS1 (mitochondrial fission 1), and DRP1 (dynamin-related protein 1), which are overexpressed in tumour cells and crucial for the development of the malignant phenotype. This evidence concerns the gene FIS1 and neoplasm.