カボザンチニブ投与により著明に腫瘍縮小を認めたMET遺伝子増幅を伴う肝細胞癌の1例

We report a case of hepatocellular carcinoma with high mesenchymal-epithelial transition (MET) gene amplification demonstrating significant tumor shrinkage after cabozantinib treatment. A male patient in his fifties had far-advanced hepatocellular carcinoma and had previously been treated with combination therapy of lenvatinib or atezolizumab plus bevacizumab but had experienced progressive disease. We conducted FoundationOne® CDx, which is a comprehensive genomic profiling test, considering the next-line efficacious treatment options, and we confirmed high copy MET gene amplification. Hence, we administered cabozantinib, which caused a significant reduction in the tumor size. This case highlights the potential of comprehensive genomic profiling in identifying efficacious drugs and emphasizes the importance of actively conducting genomic testing to improve treatment outcomes.