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KMID : 1130920190230010031
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Journal of Korean Foot and Ankle Society
2019 Volume.23 No. 1 p.31 ~ p.34
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Chondroblastoma of the Talus Mimicking an Aneurysmal Bone Cyst: A Case Report
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Park Ji-Soo
Suh Jin-Soo
Choi Jun-Young
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Abstract
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Chondroblastoma is a rare benign tumor that produces giant cells and cartilage matrix. The tumor occurs in people between 10 and 25 years with slightly higher incidence in males. The condition occurs in the proximal epiphysis of the tibia and humerus, distal epiphysis of the femur, but its occurrence in the talus is relatively rare, accounting for 4% of the total number of chondroblastoma cases. Chondroblastoma is often misdiagnosed as a primary aneurysmal bone cyst, giant cell tumor, chondromyxoid, and lesion of a secondary aneurysmal bone cyst by fibrous dysplasia. The most commonly used surgical method for chondroblastoma is broad curettage with bone grafting. In general, an aneurysmal bone cyst is associated with a second degree chondroblastoma, which is approximately 20%. Chondroblastoma of the talus and secondary aneurysmal bone cysts can be misdiagnosed as primary aneurysmal bone cysts. This paper reports a case of a young male patient with chondroblastoma of the talus, which was initially misdiagnosed as an aneurysmal bone cyst with involvement of the talo-navicular joint.
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KEYWORD
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Talus, Chondroblastoma, Aneurysmal bone cyst, Bone graft
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