File:Chondrosarcoma arising from exostosis (Radiopaedia 59996-67507 Sagittal bone window 4).jpg

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Summary:

Description	Radiopaedia case ID: 59996 Image ID: 38445606 Image stack position: 4/18 Plane projection: Sagittal Aux modality: bone window Study findings: There is a lobulated calcified mass on the medial aspect of the distal shaft of the left femur. The lesion has a pedicle and appearances are keeping with an exostosis. There is associated low attenuation area containing foci of calcification surrounding the mass. The soft tissue mass lesion is noted within the vastus intermedius muscle and is displacing the adjacent vastus medialis. There is an impression of involvement of the endosteum at the level of the pedicle. The distal shaft femoral mass lesion with aggressive features has appearances most likely representing a juxta-cortical/periosteal chondrosarcoma associated with a previous bony exostosis. Modality: CT System: Oncology Findings: There is a circumscribed enchondral lesion with a central matrix including cartilaginous and "popcorn" calcification; expansion is limited to less than the maximum width of the nearest metaphysis; these features are typical of an osteochondroma (enchondroma). There is a further expansile pedunculated bony lesion of the cortex demonstrated in relation to the mid shaft of the femur in keeping with an exostosis.
Date	Published: 10th May 2018
Source	https://radiopaedia.org/cases/chondrosarcoma-arising-from-exostosis
Author	Dinesh Brand
Permission (Permission-reusing-text)	http://creativecommons.org/licenses/by-nc-sa/3.0/

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current	17:07, 13 August 2021		640 × 640 (51 KB)	Fæ (talk \| contribs)	Radiopaedia project rID:59996 (batch #7778-48 C4)

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