• The Journal of the Korean bone and joint tumor society
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• v.12 no.1
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• pp.52-56
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• 2006

There are some malignant changes in multiple osteochondroma to chondrosarcoma, but secondary chondrosarcomas rarely develop in 1~2% of patients with solitary osteochondromas. Chondrosarcomas of the bones of hands and feet are rare, in comparison with their occurrence at other sites. The calcaneus was most commonly involved in the feet, but malignant transformation of solitary osteochondroma of the calcaneum to chondrosarcoma is extremely rare. We report one case of solitary calcaneal mass that grows slowly without pain from 6 years ago. He was 38 aged old man and surgical excision of the mass revealed chondrosarcoma arising from osteochondroma of the calcaneum.

• The Journal of the Korean bone and joint tumor society
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• v.14 no.2
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• pp.152-156
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• 2008

Osteochodromas are the most common benign osseous neoplasm, covered by a distinct hyaline cartilage cap, originating from the physis. They involve typically metaphyseal or metadiaphyseal region of a long bone, while they involve the foot rarely. In the foot, the osteochondromas mostly occur in short tubular bones such as metatarsal bones and phalanges. They are seldom found in calcaneus. We report a rare case of osteochondroma involving calcaneus.