Benign hyperostotic mass of the frontal bone.

Diagnosis of a slow-growing mass of the cranium can be challenging. We present a rare clinical report of a 19-year-old woman with a unilateral mass of the frontal bone. Pathological diagnosis was hyperostosis, which is extremely rare in this age group. A comprehensive review of literature with recommendations for diagnostic modalities and treatment options is reported. Specifically, hyperostosis frontalis interna can be evaluated with computed tomography imaging of the cranium and treated with resection and reconstruction with split calvarial bone grafts. Annual radiographic imaging is recommended to ensure remission.