Giant cell tumor of ilium: An unusual location

Giant-cell tumor (GCT) is a histologically benign, locally aggressive tumor that typically affects the ends of long bones, most commonly involving distal femur, proximal tibia, distal radius, and proximal humerus in the order of frequency. The involvement of flat bones of pelvis is extremely rare. We herein describe the unusual case of histologically benign GCT at ilium distinguished by marked destructive features on X-ray, CT, MRI, and histological examination necessitating hemi-pelvectomy in a 15-year-old female. Characteristics features of the giant cell tumor and its treatment options are reviewed.