Neoplastic Process
parosteal osteosarcoma
Subclass of:
Osteosarcoma
Definitions related to parosteal osteosarcoma:
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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.NCI ThesaurusU.S. National Cancer Institute, 2021
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(osteosarcoma, juxtacortical) A form of osteogenic sarcoma of relatively low malignancy, probably arising from the periosteum and initially involving cortical bone and adjacent connective tissue. It occurs in middle-aged as well as young adults and most commonly affects the lower part of the femoral shaft. (Stedman, 25th ed)NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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Parosteal osteosarcoma arises from periosseous tissues adjacent to the cortex. It is usually considered as an osteosarcoma variant, which must be differentiated from the intracortical and periosteal variants of osteosarcoma.WebMD, 2019
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