Similarly, for lymph node metastasis N stage, the expression of YTHDC2 in N1-stage lung cancer tissues in the TCGA LUAD and GSE30219 cohorts was significantly lower than that in N0 stage tissues, and the expression of YTHDC2 in N2 stage lung cancer tissues in the GSE30219 cohort was also significantly lower than that in N0 stage tissues (Figure S4J-L). The gene discussed is YTHDC2; the disease is lung cancer.