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Migraine is one of the most common neurological diseases.1 It is defined by specific pain characteristics and associated features.2 In about one-third of patients transient neurological symptoms known as migraine aura occur, mainly affecting the visual system.
Migraine is primarily understood as a disorder of the brain, but strong links to the vascular system exist. Migraine, particularly migraine with aura, has been firmly associated with increased risk of ischaemic stroke.3 While precise mechanisms explaining the link between migraine and ischaemic stroke remain unclear, associations between migraine and major vascular risk factors, vessel wall pathologies and small vessel disease exist,4 making it plausible that migraine is also associated with haemorrhagic stroke. This study summarises the available evidence.
Sacco and colleagues identified case–control and cohort studies evaluating the association between migraine and haemorrhagic stroke (both intracerebral haemorrhage …
Competing interests Within the past 2 years, TK has received investigator-initiated research funding from the French National Research Agency and the US National Institutes of Health. Further, he has received honoraria from the American Academy of Neurology for educational lectures and from the BMJ and Cephalalgia for editorial services.