In addition, the NSCLC patients were divided into high/low HDAC2 expression groups according to the median value of the HDAC2 expression level in NSCLC tissues of all patients, and the overall survival time of the low HDAC2 expression group was found to be notably longer than that of the high HDAC2 expression group (Fig. 1C, D). Here, HDAC2 is linked to non-small cell lung carcinoma.