2B51
category
Osteosarcoma, primary site
Definition
A usually aggressive malignant bone-forming mesenchymal tumour, predominantly affecting adolescents and young adults. It usually involves bones and less frequently extraosseous sites. It often involves the long bones (particularly distal femur, proximal tibia, and proximal humerus). Pain with or without a palpable mass is the most frequent clinical symptom. It may spread to other anatomic sites, particularly the lungs.
5 subordinate codes
Nearby in Malignant mesenchymal neoplasms
2B50Chondrosarcoma, primary site2B52Ewing sarcoma, primary site2B53Fibroblastic or myofibroblastic tumour, primary site2B54Undifferentiated pleomorphic sarcoma, primary site2B55Rhabdomyosarcoma, primary site2B56Angiosarcoma, primary site2B57Kaposi sarcoma, primary site2B58Leiomyosarcoma, primary site