Singapore Med J 2014; 55(3): e49-e51; http://dx.doi.org/10.11622/smedj.2014038
Clear cell chondrosarcoma with secondary aneurysmal bone cyst changes
Tay T, Wong BS, Sittampalam K, Lie TT
Correspondence: Dr Timothy Tay, timothy.tay@mohh.com.sg
ABSTRACT
Clear cell chondrosarcoma is a rare cartilaginous tumour of low-grade malignancy. Although it has a characteristic histological appearance, its radiological features and clinical presentation often mimic a benign lesion. Herein, we describe the case of a patient with a clear cell chondrosarcoma of the right proximal femur that had an atypical appearance of chronic avascular necrosis on initial plain radiographs, which made preoperative diagnosis a challenge. In addition, the tumour also had extensive areas of aneurysmal bone cyst-like changes, which is not only a rare histologic phenomenon in clear cell chondrosarcoma, but also a confounding factor in the interpretation of the radiologic findings.
Keywords: aneurysmal, bone cyst, chondrosarcoma, clear cell
Singapore Med J 2014; 55(3): e49–e51; http://dx.doi.org/10.11622/smedj.2014038
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