File:Chondrosarcoma arising from exostosis (Radiopaedia 59996-67686 Coronal T1 TSE LFOV 5).jpg

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Summary:

Description
  • Radiopaedia case ID: 59996
  • Image ID: 38617866
  • Image stack position: 5/8
  • Plane projection: Coronal
  • Aux modality: T1 TSE LFOV
  • Study findings: There is a sessile osteochondroma in the left femur metaphyseal region medially and typically projecting away from the epiphysis. There is a low to intermediate T1W signal mass around the exostosis. The mass lesion is iso- to slightly hyperintense compared to muscle. The cartilage cap is thick with rings and arcs calcification and there is irregular subchondral bone. The lesion is noted within the vastus intermedius muscle. The mass is distant to the femoral neurovascular bundles. The appearances are in keeping with an osteochondroma (exostosis) of the femur. The presence of aggressive features such as bony destruction, large soft tissue component are suggestive of malignant transformation.
  • Modality: MRI
  • 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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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)

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