N Concordance 1 cisional biopsy, a diagnosis of grade 2 chondrosarcoma associated with Paget's d 2 syndrome associated with a cranial base chondrosarcoma. To our knowledge, only f 3 rentiated component of dedifferentiated chondrosarcoma usually shows the histolo 4 rdoid sarcoma), a form of extraskeletal chondrosarcoma, expresses S-100 protein 5 showing well differentiated, low-grade chondrosarcoma. Five years later, local 6 on biopsy showed metastatic mesenchymal chondrosarcoma. She then received ifosfa 7 ed cases of primary orbital mesenchymal chondrosarcoma demonstrated by plain fil 8 (9;22)(q22;q12) in extraskeletal myxoid chondrosarcoma. Intra-abdominal desmopla 9 s in both kidneys. A diagnosis of nasal chondrosarcoma with bilateral renal meta 10 herefore, we recommend that a secondary chondrosarcoma should be removed with a 11 exceptional case of a low-grade spinal chondrosarcoma which apparently develope