Cavernomas are made up of abnormal blood vessels, which when they bleed they can cause strokes, seizures or even death.
Cavernomas, which look like a raspberry, are also known as cavernous angioma, cavernous haemangioma or cerebral cavernous malformation (CCM).
They can measure from a few millimetres to several centimetres. A cavernoma can get bigger, but t…
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