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Secondary chondrosarcoma is uncommon when compared to its primary type. Secondary chondrosarcoma or peripheral chondrosarcoma can arise from solitary osteocartilaginous exostosis or from hereditary multiple exostoses. Solitary exostosis giving rise to a chondrosarcoma is very uncommon. But 25 per cent of cases of hereditary multiple exostoses can develop a chondrosarcoma (Jaffe 1958). A chondrosarcoma arising from humerus in a person having multiple exostoses is recorded below.