The authors report a pediatric patient who presented with a slow-growing swelling on the scalp. Computed tomography (CT) of the head revealed an osteolytic intradiploic lesion of the cranial vault. The lesion was excised in toto, and histopathological examination revealed benign intradiploic meningioma. The possible etiology, clinical findings, CT appearance, differential diagnosis, and treatment strategy are discussed.