Key mitotic regulators, including kinases such as PLK1, AURKA, AURKB, and MPS1 and kinesins such as CENPE and Eg5, are frequently overexpressed in NSCLC and SCLC, contributing to chromosomal instability, aneuploidy, and highly proliferative tumor phenotypes. This evidence concerns the gene PLK1 and non-small cell lung carcinoma.