MLKL and non-functioning pituitary adenoma: The correlations between MLKL gene expression level and patient’s clinic pathological features which is summarized in Table 7 showed that MLKL expression was significantly correlated with tumor size in invasive NFPA group (P = 0.039); while no other remarkable correlation was detected regarding the MLKL expression with tumor size, age and patient’s gender in GHPPA and NFPA group.