[Acute brainstem encephalitis and myelitis in a girl with isolated methylmalonic aciduria due to MUT gene defect].
Zhongguo Dang Dai Er Ke Za Zhi
; 17(10): 1103-6, 2015 Oct.
Article
em Zh
| MEDLINE
| ID: mdl-26483233
ABSTRACT
Methylmalonyl CoA mutase deficiency due to MUT gene defect has been known as the main cause of isolated methylmalonic acidemia in Mainland China. This study reported a patient with isolated methylmalonic aciduria (MUT type) characterized as acute brainstem encephalitis and myelitis. The previously healthy girl presented with fever, lethargy and progressive weakness in her extremities at the age of 3 years and 2 months. Three day later, she had respiratory distress and consciousness. Cranial MRI revealed bilateral symmetrical lesion of pallidum, brain stem and spinal cord, indicating acute brainstem encephalitis and myelitis. Her blood propionylcarnitine (6.83 µmol/L vs normal range 1.0 to 5.0 µmol/L) and urinary methylmalonic acid (133.22 mmol/mol creatinine vs normal range 0.2 to 3.6 mmol/mol creatinine) increased significantly. Plasma total homocysteine was normal. On her MUT gene, a reported mutation (c.1630_1631GG>TA) and a novel mutation (c.1663C>T, p.A555T) were identified, which confirmed the diagnosis of methylmalonic aciduria (MUT type). After cobalamin injection, protein-restricted diet with the supplements of special formula and L-carnitine, progressive improvement has been observed. The clinical manifestation of patients with methylmalonic aciduria is complex. Metabolic study and gene analysis are keys for the diagnosis and treatment of the disorder.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tronco Encefálico
/
Encefalite
/
Erros Inatos do Metabolismo dos Aminoácidos
/
Metilmalonil-CoA Mutase
/
Mutação
/
Mielite
Tipo de estudo:
Prognostic_studies
Limite:
Child, preschool
/
Female
/
Humans
Idioma:
Zh
Revista:
Zhongguo Dang Dai Er Ke Za Zhi
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
China