An Atypical Case Of Head Tremor And Extensive White Matter In An Adult Female Caused By 3-Hydroxy-3-Methylglutaryl-Coa Lyase Deficiency

Nassim Boutouchent, Julie Bourilhon,Benedicte Sudrie-Arnaud, Antoine Bonnevalle,Lucie Guyant-Marechal,Cecile Acquaviva, Lorena Dujardin-Ippolito,Soumeya Bekri,Ivana Dabaj,Abdellah Tebani

DIAGNOSTICS(2021)

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摘要
3-Hydroxy-3-methylglutaryl-CoA (HMG-CoA) Lyase deficiency (HMGLD) (OMIM 246450) is an autosomal recessive genetic disorder caused by homozygous or compound heterozygous variants in the HMGCL gene located on 1p36.11. Clinically, this disorder is characterized by a life-threatening metabolic intoxication with a presentation including severe hypoglycemia without ketosis, metabolic acidosis, hyper-ammoniemia, hepatomegaly and a coma. HMGLD clinical onset is within the first few months of life after a symptomatic free period. In nonacute periods, the treatment is based on a protein- and fat-restricted diet. L-carnitine supplementation is recommended. A late onset presentation has been described in very few cases, and only two adult cases have been reported. The present work aims to describe an incidental discovery of an HMGLD case in a 54-year-old patient and reports a comprehensive review of clinical and biological features in adult patients to raise awareness about the late-onset presentation of this disease.
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关键词
HMGLD, HMGCL, HMG-CoA lyase deficiency, NGS, inherited metabolic diseases
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