A and B, Anteroposterior and lateral radiographs of distal radius of 40-year-old woman with pathologic fracture through giant cell tumor. C to E, Axial (C), sagittal (D), and coronal (E) MR images of lesion. F, Intraoperative photograph of tumor in situ. G, Tumor has been resected en bloc. H, Contralateral proximal fibular autograft. I, Graft has been secured with wrist fusion plate. J, Photograph of resected specimen. K, Typical microscopic appearance of giant cell tumor. Nuclei of giant cells are identical to nuclei of mononuclear cells. L and M, Anteroposterior and lateral postoperative radiographs.