MCL1 and non-small cell lung carcinoma: In tissue samples of NSCLC, the expression of MCL-1 could be correlated to the proliferation and apoptosis index and serve as a biomarker for survival: the five-year OS of patients with MCL-1 positive staining (68.3%) was inferior as compared to the survival of those with MCL-1-negative tumors (93.1%) [54].