Abstract: Disclosed herein are methods for treating an EGFR-mutant cancer in a patient in need thereof by administering to the patient a therapeutically effective amount of at least one RET inhibitor (e.g., Compound 1 and/or pharmaceutically acceptable salts thereof) and a therapeutically effective amount of at least one EGFR inhibitor (e.g., osimertinib and/or pharmaceutically acceptable salts thereof), as well as combination therapies including at least one RET inhibitor and at least one EGFR inhibitor.