Osteochondroma transform into secondary low grade chondrosarcoma with similar histology features: Case report

Abstract

Osteochondroma is the most common form of benign bone tumors. Chondrosarcoma is a rare malignant bone tumor that may be primary or secondary. We report the case of a 19-year-old man with low grade chondrosarcoma secondary to malignant transformation of osteochondroma of the right distal femur. Here we discuss osteochondroma, chances of malignancy secondary to osteochondroma, chondrosarcoma, work up done in our case, histopathological features to differentiate osteochondroma from low grade chondrosarcoma, as well as treatment options that have shown significant benefits in patient’s outcomes.