A case of lung adenocarcinoma with MET∆ex14 mutation regressed after preoperative treatment with savolitinib, and successfully underwent radical resection.

Non-small cell lung carcinoma (NSCLC) is a complex disease, with many different potential gene mutations that drive its formation, occurrence, and development. It is estimated that about 3% of NSCLC patients are accompanied by MET exon 14 skipping (METex14) mutations, and the prognosis of such patients is generally poor, which forms a formidable challenge for us. Savolitinib (Orpathys) is the first highly selective MET inhibitor in China. Here, we presented an NSCLC patient with MET∆ex14 mutation, who was initially uncertain whether existed intrapulmonary metastasis and recently underwent percutaneous coronary intervention for acute myocardial infarction and received savolitinib 600 mg once a day. The tumor was significantly shrunk 6 months later, and no metastatic lesions were found. Eventually, it was determined that the patient was in the early stage of lung cancer. After experts' consultation and evaluation, the patient accepted radical tumor resection and recovered well. Therefore, savolitinib is an important treatment strategy for NSCLC patients with MET∆ex14 mutation, who was not suitable for surgery. Our experience may provide supporting evidence and guidance for implementing an effective therapeutic strategy for similar cases.