Soft Tissue

This study introduces an innovative and cost-effective method for detecting gene fusions in bone and soft tissue tumors, particularly sarcomas. The protocol integrates a custom capture panel with Nanopore sequencing and TEQUILA-based probe synthesis. Validated on 24 samples, including FFPE tissues, it demonstrated reliable fusion detection and gene expression quantification concordant with short-read sequencing. This approach promises to enhance the accessibility of molecular diagnostics for rare cancers due to its flexibility and reduced cost.

This retrospective study investigated the impact of additional EWSR1 rearrangements on treatment outcomes in Ewing sarcoma. Analyzing a national cancer genomic database (C-CAT) of 90 cases, researchers found that the presence of coexisting EWSR1 rearrangements, beyond the primary EWSR1-ETS fusion, was associated with higher rates of disease progression on first-line chemotherapy. A representative case highlighted primary resistance to multiple lines of therapy in a patient with an additional ETS1-EWSR1 fusion, contrasting with a good response observed with an isolated EWSR1-FLI1 fusion. These findings suggest that these additional rearrangements may hold significant prognostic implications and warrant further investigation to optimize treatment strategies.