Unusual osteolytic midline lesion of the skull: benign osteoblastoma of the parietal bone.

The authors report the case of a 5-year-old girl who presented with a parietal midline sub-scalp lesion. Skull radiographs demonstrated a lytic lesion surrounded by a sclerotic rim that resembled a dermoid cyst of the cranium. Histopathological analysis proved that the lesion was a benign osteoblastoma. As in other calvarial masses of uncertain nature, after diagnostic workup, we recommend surgical excision both for diagnosis and for treatment.