CONTRADICTING EVIDENCE: The MOBILITY3 trial evaluated the antitumor activity of afatinib, an oral pan-HER tyrosine kinase inhibitor (TKI) in HER-aberrant tumors outside of the licensed indications....All 3 patients with salivary gland cancers and 1 patient with ERBB2-mutant NSCLC had clinical benefit (stable disease or partial response lasting > 24 weeks).