In our study, we are first to describe the use of a pan-TRK antibody (clone EPR17341, Assay, Roche, Ventana), an immunohistochemical assay performed automatically on Benchmark Ultra platform, in a large group of different soft tissue sarcomas and show similar results to previously published data using a different pan-TRK antibody (clone EPR17341, Abcam) [6, 29, 30, 38, 39]. This evidence concerns the gene NTRK1 and soft tissue sarcoma.