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- W2009532891 abstract "Introduction There is no clear radiologic or pathologic agreement on the differences between enchondroma and conventional chondrosarcoma, which has huge therapeutic consequences. Microscopically, an enchondroma is composed of “islands of intramedullary hyaline cartilage surrounded by marrow fat”, and a chondrosarcoma a “diffuse cartilaginous replacement (invasion) of the marrow which leads to complete ‘trapping’ of host lamellar bone trabeculae.” The marrow around islands of cartilage should be detectable on magnetic resonance imaging (MR). Enchondroma may be the precursor of chondrosarcoma; benign cartilaginous islands are often seen microscopically at the periphery of chondrosarcoma. We attempted to detect these islands at the periphery of chondrosarcomas on MR and correlate them microscopically. Materials and methods We examined our database for all patients with a chondrosarcoma of the long and flat bones between 1990 and 2007. Only those with a preoperative MR who underwent an en bloc resection were included, yielding 32 patients. We looked for low-signal islands surrounded by high (fat) signal on T1-weighted images, and high-signal islands surrounded by low signal on T2-weighted fat saturated images at the periphery of the main tumour mass. Microscopic correlation was performed in all cases. Results On microscopy, there were 23 conventional chondrosarcomas, nine dedifferentiated. Peripheral islands surrounded by fat were detected on MR in 19 cases, corresponding to benign cartilage in 18 cases and to the benign scar of a needle biopsy tract in one. There were no peripheral islands detected radiographically or microscopically in 13 cases. Conclusion Cartilaginous islands microscopically detected at the periphery of some chondrosarcomas are easily and reliably diagnosed on MR." @default.
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- W2009532891 date "2013-12-01" @default.
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- W2009532891 title "Enchondroma vs. chondrosarcoma: A simple, easy-to-use, new magnetic resonance sign" @default.
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- W2009532891 doi "https://doi.org/10.1016/j.ejrad.2011.11.043" @default.
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