26y, male Epiphysiolysis, fixed with screw at 12 years. Currently with pain after fall.
Malignant endothelial vascular neoplasm, that affects a variety of sites (commonly occurs in skin). Represents <1% of primary malignant bone tumors. It arises more commonly in young and the males are slightly more affected than females.
Angiosarcoma presents mostly as a purely lytic mass. Lesional sclerosis and periosteal new bone formation are uncommon.
Treatment: radical local resection and radiation therapy. Reference article.
Primary angiosarcoma of bone