Definition: The term "intrasusception" is a medical term that refers to the process by which blood vessels within the brain drain blood from certain areas of the brain, known as the cerebral cortex. This can occur due to various causes such as bleeding disorders, stroke, or other neurological conditions. Intra-cerebral vasculitis (also known as intracranial haemorrhage) is a type of intrasusception where blood vessels in the brain drain blood into the brain and