Aneurysmal bone cysts in the skull vault are reported in two patients
7 and 9 years old, who presented with vomiting and headaches caused by
raised intracranial pressure. CT showed the cystic lesion in the dipl
oe, with predominantly inward expansion. Fluid-fluid levels were seen
on both CT and MRI; the latter also showed bleeding within the cyst. M
R angiography showed compression of the superior sagittal sinus in the
second case.