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6.3 Headache attributed to unruptured vascular malformation

Coded elsewhere:

New headache attributed to ruptured vascular malformation is coded as 6.2.1 Acute headache attributed to intracerebral haemorrhage, 6.2.2 Acute headache attributed to subarachnoid haemorrhage or, rarely, 6.2.3 Acute headache attributed to non traumatic acute subdural haemorrhage.


Headache secondary to an unruptured intracranial vascular malformation (occurring without haemorrhage). Depending on the type of malformation, the headache may have a chronic course with recurrent attacks mimicking episodic primary headaches, or an acute and self-limiting course.