New diagnostic modalities in the diagnosis of primary and recurrent giant-cell tumors of bone.

Computed tomography (CT) and/or digital subtraction angiography (DSA) were performed on four patients with primary or recurrent giant-cell tumor of bone. In three cases presented, the tumor was examined with CT and had a precontrast attenuation value of about +50 to +65 HU with unequivocal nonhomogeneous contrast enhancement. In both cases in which DSA was used, contrast-medium enhancement could be recorded by DSA that had definitely not been seen with conventional angiography. It is suggested that in the future CT and DSA may replace conventional angiography in the diagnostic workup of giant-cell tumors.