This patient has a typical giant cell tumor in the lower end of the radius on the plain radiograph (Fig. 1). The T1W coronal (Fig. 2) and T2W sagittal (Fig. 3) images, show typical features. On the contrast enhanced study, the lesion shows homogeneous enhancement (Fig. 4). The dynamic study however shows that the lesion is vascular with rapid uptake and wash-out, paralleling the artery (Fig. 5).
This is a curve usually seen with malignant tumors, but also seen in the vast majority of virgin and especially recurrent tumors.