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Familial Hemiplegic Migraine with Prolonged Coma and Hyperthermia: ATP1A2 Gene Mutation Case Report in a Single Saudi Family.

Waleed Altwaijri, Fuad Almalki, Ahmed Al-Rumayyan, Safiyyah Ahmed Asiri.


Abstract

Background: Familial hemiplegic migraine (FHM) is a rare disorder presented commonly with coma, hyperthermia, and headache. FHM is usually associated with fully reversible motor weakness as a specific symptom of aura. Seizure and fever are the secondary features observed. All the affected individuals were subjected to several laboratory tests.
Case presentation: Three sisters diagnosed with type 2 familial hemiplegic migraines presenting features such as coma and hyperthermia. The brain (MRI) revealed focal subtle cortical swelling, Electroencephalography (EEG) showed unilateral slowing, while no signs of infectious disease were observed. Molecular and genetic tests using whole exome sequencing (WES) identified a novel heterozygous mutation (c.2450T>A p.Ile817Asn) in the exon 18 of the ATP1A2 gene (NM_000702.3). The variant segregated with the disease phenotype within the family.
Conclusion: The current study report for the first time, a Saudi family with migraine coma having a novel heterozygous AT1A2 mutation.

Key words: Familial hemiplegic migraine, coma, hyperthermia, cortical spreading depression






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