peripheral osteosarcoma juxtacortical osteosarcoma https://www.malacards.org/card/parosteal_osteosarcoma parosteal osteosarcoma MESH:D018217 ICDO:9192/3 GARD:0024479 PAOS UMLS:C0206642 juxtacortical osteogenic sarcoma ONCOTREE:PAOS A low grade malignant bone-forming mesenchymal neoplasm arising from the surface of the bone. It usually affects the distal posterior femur, the proximal tibia, and proximal humerus. Painless swelling is the usual clinical sign. Most patients are young adults and the prognosis is usually excellent. NCIT:C8969 parosteal osteogenic sarcoma EFO:1001000 DOID:3373 MEDGEN:60197 MONDO:0006817 juxtacortical osteosarcoma