MET mutations were detected in 4.1% of patients with BTCs, including 5.3% in ICC, 3.4% in hilar cholangiocarcinoma (HCCA), 3.0% in ECC, and 2.6% in gallbladder cancer (GBCA). Gene amplification was the most common type of MET mutation in BTC (2.6%) compared with gene rearrangements/fusions (1.1%) and SNV (0.9%). Novel MET fusion partners, including TNS3 and TRIM4, and MET exon 14 skipping mutation, were also detected....MET mutations were detected in 4.5% BTCs, and MET inhibitors may be potential treatment options for BTC patients.