Cephalalgia : an international journal of headache
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Previous cross-sectional studies evaluating the relationship between diabetes prevalence and migraine status have found conflicting results. We examined the relationship between migraine and incident type 2 diabetes (T2D) in a cohort of adult women. ⋯ Results of this prospective study in women do not support an association between migraine and incident T2D.
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Migraine is a prevalent neurological disorder with a complex genetic background characterized by recurrent episodes of headache. The disease is subclassified into migraine with aura (MA) and migraine without aura (MO). Many association studies have been performed to date to identify genetic risk variants for common migraine, most of them focusing on selected candidate genes, with variable and often inconsistent results. Recently, a clinic-based genome-wide association study for migraine reported a functionally relevant risk variant (SNP rs1835740), involved in glutamate homeostasis, which showed a significant association with MA. We aimed to replicate this finding in a clinic-based study of a Spanish cohort with MA and MO patients. ⋯ No association was found between the assayed SNP and any of the clinical groups considered.
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Analysis of habituation patterns in patients with primary headache disorders allows the detection of changes to the excitability level of the trigeminal nociceptive system. Previous studies demonstrated a habituation deficit to painful stimuli in migraine and it was suggested that similar observations could be made in cluster headache (CH). ⋯ Our results did not detect an altered habituation in CH patients. Despite clinical similarities, migraine and CH seem not to share the same pathophysiological mechanisms in this regard.
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Case Reports
Bilateral paroxysmal cephalalgia: a novel indomethacin-responsive primary headache syndrome?
Paroxysmal hemicrania (PH) is a primary headache disorder characterised by frequent, short-lasting, very severe, strictly unilateral attacks occurring in association with cranial autonomic features. A striking feature of this disorder is its clear response to indomethacin. ⋯ There have been several case reports of patients presenting with short-lasting, frequent, bilateral headaches responding to indomethacin, without cranial autonomic features. These cases have been described as representing bilateral PH although strict unilaterality of pain and cranial autonomic phenomena are cardinal features of PH. These cases may represent a novel indomethacin-responsive syndrome and therefore, for now, should be studied separately from PH until their pathophysiological basis is better understood.
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Allodynia is frequently associated with migraine and other primary headaches. Our aim was to investigate the presence of allodynia and related features in idiopathic intracranial hypertension (IIH), which is a disabling secondary headache disorder. ⋯ Half of the IIH patients reported allodynia, and these allodynic patients had mostly migraine-like headache profiles. Our study suggested that IIH may trigger some common mechanisms with migraine in pain pathways causing allodynia.