obsolete_juxtacortical osteosarcoma true juxtacortical osteosarcoma juxtacortical osteogenic sarcoma ICDO:9192/3 EFO:1001000 parosteal osteosarcoma parosteal osteogenic sarcoma 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. 3.88.0 PAOS Replaced by Mondo term MONDO_0006817, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006817 ONCOTREE:PAOS UMLS:C0206642 NCIT:C8969 MESH:D018217 DOID:3373 http://purl.obolibrary.org/obo/MONDO_0006817