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Year : 2021  |  Volume : 16  |  Issue : 4  |  Page : 319-322

Clinical phenotype of FASTKD2 mutation

Child Neurology and Epilepsy Center, Surat, Gujarat, India

Correspondence Address:
Dr. Seema Balasubramaniam
Clinical Extern, Child Neurology and Epilepsy Center, 4th Floor, Sangini Square Near Kashi Plaza, Majura gate, Surat 395002, Gujarat
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jpn.JPN_199_20

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Mitochondrial disorders (MIDs) are frequently multisystemic in nature and cause significant morbidity and mortality. Accurate assessment of mitochondrial disease prevalence has been difficult in the past. Primary MIDs are due to mutations in mitochondrial DNA (mtDNA) or nuclear DNA (nDNA)-located genes. Here we report cases of two siblings who presented to the pediatric emergency department with status epilepticus. Initially, the elder sibling was treated for metabolic encephalopathy and viral encephalitis, during his admission to the hospital. On treatment with multiple antiepileptic drugs, the status epilepticus subsided. A provisional diagnosis of mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes was made. Magnetic resonance imaging showed diffusion restriction in the left temporal lobe, insular cortex, and left lentiform nucleus, which completely resolved on follow-up after 1 month. His sudden demise in May 2019 due to status epilepticus, and a similar case presentation in his younger sibling, prompted us to do a genetic analysis test. The exome sequence revealed FASTKD2 mutation, a rare variant. This case report helps in increasing the awareness among the clinicians about the clinical presentation of FASTKD2 mutation case.


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