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Chondroblastoma of the Talus Mimicking an Aneurysmal Bone Cyst: A Case Report
J Korean Foot Ankle Soc 2019;23:31-34
Published online March 15, 2019;
© 2019 Korean Foot and Ankle Society

Ji Soo Park, Jin Soo Suh, Jun Young Choi

Department of Orthopedic Surgery, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
Correspondence to: Jun Young Choi, Department of Orthopedic Surgery, Inje University Ilsan Paik Hospital, 170 Juhwaro, Ilsanseo-gu, Goyang 10380, Korea
Tel: 82-31-910-7968, Fax: 82-31-910-7967, E-mail:
Received November 12, 2018; Revised January 8, 2019; Accepted January 28, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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.
Keywords : Talus, Chondroblastoma, Aneurysmal bone cyst, Bone graft

June 2019, 23 (2)