Joint Neoplasia

()Map MUSCULOSKELETAL SYSTEM (Map) JOINTS

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

Ganglion cysts

• Usually in close proximity to joints and tendon sheaths
• Extremely rare in veterinary medicine c.f. humans
• No consensus as to genesis
• Cysts contain mucinous/yellow fluid
• More about ganglion cysts