Cavernoma
Cavernoma (also called cavernous angioma), vascular malformation intracranial with unique histological and imaging characteristics. They are quite common and frequently asymptomatic occasional findings on imaging studies; it is estimated that 4% of the population harbours this lesion. They appear as discrete, compact nodules of endothelial-lined sinusoidal vascular spaces, which contain essentially subacute to chronic clotted blood and are not infrequently multiple. They may range from 1 mm to several cm in diameter. They are congenital and may be familial; however, they may appear or manifest late in life, and may evolve and change in size as well as in appearance during life. If symptoms do occur, the clinical presentation may include seizures, haemorrhage, or progressive neurological deficit. The epileptic activity is thought to be due to the irritating effects of haemosiderin, gliosis, and compression on adjacent cortex. Haemorrhage is usually relatively limited to the proximity