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5. HEADACHE ATTRIBUTED TO HEAD AND/OR NECK TRAUMA 6. HEADACHE ATTRIBUTED TO CRANIAL OR CERVICAL VASCULAR DISORDER 6.1. Headache attributed to ischaemic stroke or transient ischaemic attack6.1.1. Headache attributed to ischaemic stroke (cerebral infarction) [I63] 6.1.2. Headache attributed to transient ischaemic attack (TIA) [G45] 6.2. Headache attributed to non-traumatic intracranial haemorrhage [I62] 6.3. Headache attributed to unruptured vascular malformation [Q28] 6.4. Headache attributed to arteritis [M31]6.5. Carotid or vertebral artery pain [I63.0, I63.2, I65.0, I65.2 or I67.0]6.6. Headache attributed to cerebral venous thrombosis (CVT) [I63.6] 6.7. Headache attributed to other intracranial vascular disorderBibliography7. HEADACHE ATTRIBUTED TO NON-VASCULAR INTRACRANIAL DISORDER 8. HEADACHE ATTRIBUTED TO A SUBSTANCE OR ITS WITHDRAWAL 9. HEADACHE ATTRIBUTED TO INFECTION 10. HEADACHE ATTRIBUTED TO DISORDER OF HOMOEOSTASIS 11. HEADACHE OR FACIAL PAIN ATTRIBUTED TO DISORDER OF CRANIUM, NECK, EYES, EARS, NOSE, SINUSES, TEETH, MOUTH OR OTHER FACIAL OR CRANIAL STRUCTURES 12. HEADACHE ATTRIBUTED TO PSYCHIATRIC DISORDER 

IHS	Diagnosis	ICD-10
6.1.2	Headache attributed to transient ischaemic attack (TIA) [G45]	G44.810

Diagnostic criteria:

Any new acute headache fulfilling criteria C and D
Focal neurological deficit of ischaemic origin lasting <24 hours
Headache develops simultaneously with onset of focal deficit
Headache resolves within 24 hours

Comment:

Whilst more common with basilar- than carotid-territory TIA, headache is very rarely a prominent symptom of TIA. The differential diagnosis between TIA with headache and an attack of migraine with aura may be particularly difficult. The mode of onset is crucial: the focal deficit is typically sudden in a TIA and more frequently progressive in a migrainous aura. Furthermore, positive phenomena (eg, scintillating scotoma) are far more common in migrainous aura than in TIA whereas negative phenomena are more usual in TIA.

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