TTK and malignant mesothelioma: Inhibition of TTK has emerged as a promising therapeutic strategy for the treatment of aneuploid tumors, with triple-negative breast cancer (TNBC) (Maia et al. 2015; Riggs et al. 2017; Thu et al. 2018; Zhu et al. 2018) and malignant mesothelioma (Szymiczek et al. 2017) important focus of clinical development.