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Use of a MET inhibitor in a patient with newly diagnosed advanced NSCLC with METex14 skipping mutation
An 80-year-old Chinese male, a long-term smoker with no signifÂicant medical history, was found to have a right lung mass on a routine chest X-ray in August 2021. A CT scan of the chest revealed a domiÂnant right lower lobe mass (3.3 x 2.3 x 2.7 cm) with multiple bilateral lung nodules. CT-guided fine needle aspiration cytology (FNAC) of the right lower lobe mass performed on 2 December 2021 confirmed adenoÂcarcinoma, while a PET-CT scan on 10 January 2022 showed a right lowÂer lobe tumour with metastases to the left hilar and mediastinal lymph nodes and both lungs. (Figure 1A) Next-generation sequencing (OncoSnap Nonet) identified MET exon 14 (MEÂTex14) skipping mutation. The proÂgrammed death ligand 1 (PD-L1) tumour proportion score (TPS) was 0 percent. The patient was diagnosed with stage IV non-small-cell lung canÂcer (NSCLC) harbouring a METex14 skipping mutation. His Eastern CoopÂerative Oncology Group performance status (ECOG PS) was 0.




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