Giant Cell Tumor of the Frontal Bone: A Case Report and Literature Review.

Giant cell tumors are rare benign lesions that typically occur at the epiphyses of long bones in the extremities and present with pain or swelling. These lesions very seldom occur in the skull, where they preferentially affect the sphenoid and temporal bones that develop by endochondral ossification. We report a rare case of a giant cell tumor of the frontal bone and review the literature on these lesions. A 21-year-old woman presented with localized swelling and tenderness over the left frontal bone. Imaging revealed a lytic lesion involving the left frontal bone, which was managed via left frontal craniectomy with resection of the bone and epidural mass. Histopathology revealed a giant cell tumor of bone (GCTB). Most data on giant cell tumors in the skull consist of case reports, with many large series of giant cell tumors having no examples in the skull. This report contributes to the scarce literature on these tumors in the skull.