Primary neoplasia

Human synovial sarcoma (Image sourced from Bristol Biomed Image Archive with permission)
  • Rare
  • Synoviomas
  • Synoviosarcomas
  • Mass must have connection with the joints to be diagnosed as such


Extension neoplasia

  • From nearby osteosarcomas and marrow tumours


Metastatic neoplasia

  • Occasionally from lymphosarcoma, carcinoma of prostate and mammary glands - may extend to lumbar vertebrae from regional (dorsolumbar) lymph nodes