Similar to their predicted STS subtypes, MFH sarcomas predicted as fibrosarcomas (MFH-FIBRO) had similarly high average probability of PI3K pathway activation (0.99 vs 0.99 in MFH-FIBRO and FIBRO respectively) and similarly low average probability of Src pathway activation (0.01 vs 0.13 respectively). This evidence concerns the gene SRC and fibrosarcoma.