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| + | ===Primary neoplasia=== |
| + | [[Image:Human synovial sarcoma.jpg|right|thumb|100px|<small><center>Human synovial sarcoma (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]] |
| + | *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 on Ganglion cysts|More about ganglion cysts]] |