Four patients who presented with calvarial masses which subsequently turned out to be meningiomas are presented. Three of these lesions presented with scalp swellings and osteolytic lesions on the plain radiographs. These three lesions had eroded the inner and outer tables of the skull with soft tissue components in the extradural plane. The fourth lesion was an entirely intraosseous meningioma. The clinical, radiological and pathological findings are discussed, and the relevant literature is reviewed.