In the panel-sequencing we found a mutation of FGFR1 (chromosome 8; position (GRCh37) 38287303; c354G > A; p.E118) in the resection specimen of the GCTB and in the sarcoma with an allele frequency of 10%, which was not found in the biopsy. This evidence concerns the gene FGFR1 and sarcoma.