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The molecular-genetic profile of lung cancer is highly diverse, complicating the formation of a unified patient portrait and necessitating the incorporation of specific genetic testing into diagnosis. There are key mechanisms for the activation of oncogenes, including point mutations, copy number changes (amplifications), and fusions, which are observed in non-small cell lung cancer (NSCLC). Modern molecular-targeted therapy for patients with NSCLC increases the duration of disease control and, in some cases, can transform a once-fatal disease into a chronic condition. Currently, the standard testing panel includes the identification of mutations in the EGFR gene (exons 18–21), ALK translocations, ROS1 translocations, and BRAF V600E mutations. However, less common alterations such as RET and NTRK translocations also occur. The use of next-generation sequencing (NGS) allows for the identification of rarer genetic alterations. NTRK gene fusions are considered oncogenic factors for various solid tumors in both adults and children. The prevalence of NTRK gene alterations varies by tumor type. However, in lung cancer, this type of genetic alteration is rare, with an overall prevalence of less than 3%, and typically the occurrence rate is less than 1%. Currently, three drugs have been included in international clinical guidelines as potential treatment options for NTRK translocations, demonstrating their effectiveness. Several other drugs are at various stages of clinical trials. In this review, we will highlight the existing data for a better understanding of the patient profile with NTRK and present a clinical case.
The molecular-genetic profile of lung cancer is highly diverse, complicating the formation of a unified patient portrait and necessitating the incorporation of specific genetic testing into diagnosis. There are key mechanisms for the activation of oncogenes, including point mutations, copy number changes (amplifications), and fusions, which are observed in non-small cell lung cancer (NSCLC). Modern molecular-targeted therapy for patients with NSCLC increases the duration of disease control and, in some cases, can transform a once-fatal disease into a chronic condition. Currently, the standard testing panel includes the identification of mutations in the EGFR gene (exons 18–21), ALK translocations, ROS1 translocations, and BRAF V600E mutations. However, less common alterations such as RET and NTRK translocations also occur. The use of next-generation sequencing (NGS) allows for the identification of rarer genetic alterations. NTRK gene fusions are considered oncogenic factors for various solid tumors in both adults and children. The prevalence of NTRK gene alterations varies by tumor type. However, in lung cancer, this type of genetic alteration is rare, with an overall prevalence of less than 3%, and typically the occurrence rate is less than 1%. Currently, three drugs have been included in international clinical guidelines as potential treatment options for NTRK translocations, demonstrating their effectiveness. Several other drugs are at various stages of clinical trials. In this review, we will highlight the existing data for a better understanding of the patient profile with NTRK and present a clinical case.
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