Vascular neurosurgery is a complex subspecialty that treats injuries related to haemorrhages or strokes in the brain or spinal cord. It is a very complex subspecialty, due to high technical requirements, and the effects that these conditions can have on the life and function of the patient. Vascular neurosurgery covers arterial aneurysms, vascular malformations and dural arteriovenous fistulas. It also treats cavernomas, which are midway between vascular and tumoural lesions, and some diseases that can cause cerebral infarctions. Here is a brief summary of some of the conditions treated by vascular neurosurgery: