Giant cell tumor (GCT) is a relatively common primary bone tumor that typically develops in young adults between the ages of 20 and 40 years. Our archives contain i , i 83 cases of histologically proved and radiographically correlated GCTs, collected in consultation over 40 years. From this large series, we identified 243 lesions (2 i% of GCTs) arising in the upper extremity distal to the scapula. This report demonstrates the spectrum of radiologic findings of GCT of the upper extremity, augmented where appropriate by accompanying pathologic material.
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