DUSP13B and lung cancer: Dual‐specificity phosphatase 13B (DUSP13B) belongs to the DUSPs protein family and can dephosphorylate phosphorylated tyrosine and serine/threonine residues.[19] Research has suggested that the coexpression of DUSP13B and DUSP4 weakens transforming growth factor β‐1 (TGFβ‐1)‐mediated invasion, migration, and chemotherapy resistance in lung cancer.[20] However, there have been no investigations into the involvement of DUSP13B in osimertinib resistance.