1.Clear cell chondrosarcoma with secondary aneurysmal bone cyst changes.
Timothy TAY ; Steven Bak Siew WONG ; Kesavan so SITTAMPALAM ; Denny Tjiauw Tjoen LIE
Singapore medical journal 2014;55(3):e49-51
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.
Adult
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Bone Cysts, Aneurysmal
;
complications
;
diagnostic imaging
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Bone Neoplasms
;
complications
;
diagnostic imaging
;
Chondrosarcoma
;
complications
;
diagnostic imaging
;
Female
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Femur
;
diagnostic imaging
;
pathology
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Hip
;
pathology
;
Humans
;
Magnetic Resonance Imaging
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Necrosis
;
pathology
;
Osteoarthritis
;
diagnostic imaging
;
Radiography
;
Whole Body Imaging