SKULL - Calvarial haemangioma

The specimen shows the skull, which can be seen posteriorly; the bone is expanded by a partly cystic brown mass in which there are bony trabeculae.
This man presented at the age of 34 with a 4-5 week history of blurred right-sided vision, right retro-orbital pain and right frontal headache. He had known that there was a lump on the top of his skull for some years, which had been attributed to a rugby injury. Examination showed gross papilloedema but no localising signs. The radiological appearances suggested that this was a meningioma; at operation it was found to have two feeder vessels from the middle meningeal artery and the histology of the lesion is that of a haemangioma.