• (fibrosarcoma, malignant) A malignant mesenchymal neoplasm of the soft tissue and bone.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• A fibroblastic sarcoma is a malignant tumor derived from fibrous connective tissue and characterized by immature proliferating fibroblasts or undifferentiated anaplastic spindle cells.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• A malignant mesenchymal fibroblastic neoplasm affecting the soft tissue and bone.
  NCI
  U.S. National Cancer Institute, 2021
• A sarcoma derived from deep fibrous tissue, characterized by bundles of immature proliferating fibroblasts with variable collagen formation, which tends to invade locally and metastasize by the bloodstream. (Stedman, 25th ed)
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Sarcoma derived from deep fibrous tissue, characterized by bundles of immature proliferating fibroblasts with variable collagen formation, which tends to invade locally and metastasize by the bloodstream.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Fibrosarcoma is a tumor of mesenchymal cell origin that is composed of malignant fibroblasts in a collagen background. It can occur as a soft-tissue mass or as a primary or secondary bone tumor.
  Medscape
  WebMD, 2025
• Fibrosarcoma, rare malignant tumour of fibrous tissue most commonly found in middle-age adults and primarily occurring in the thighbone, upper arm bone, or jaw; the tumour also may arise in soft tissues and organs. The mass is detectable by palpation before pain occurs. The tumour may invade...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025