Novel presentation of AADC deficiency as a mild phenotype with exercise-induced dystonic crises: A case report.
Heliyon
; 10(1): e23746, 2024 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-38192810
ABSTRACT
Aromatic l-amino acid decarboxylase (AADC) deficiency is a rare autosomal recessive neurometabolic disorder caused by biallelic pathogenic variants in the DDC gene; approximately 140 patients have been described worldwide. AADC deficiency is characterised by a combined deficiency of dopamine, serotonin, adrenaline and noradrenaline causing a highly variable phenotype with developmental delay, early-onset hypotonia, movement disorders and autonomic symptoms. We expand the phenotype of this neurometabolic disorder by reporting on a paediatric patient with a mild phenotype with atypical exercise-induced dystonic crises, a feature that has not been described in AADC deficiency up till now. Additionally, we also present a second patient with typical characteristics and a severe phenotype. The diagnosis in both patients was confirmed by the presence of a homozygous pathogenic variant in the DDC gene and reduced AADC enzyme plasma activity. The use of whole exome sequencing-based strategies has played a crucial role in diagnosing these two patients.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Heliyon
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Bélgica