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GTR Home > Tests > Dihydropyrimidine dehydrogenase deficiency, 274270, Autosomal recessive (Dihydropyrimidine dehydrogenase deficiency) (DPYD gene) (Sequence Analysis-All Coding Exons) (Prenatal)

Indication

This is a clinical test intended for Help: Diagnosis

Clinical summary

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Imported from OMIM

Dihyropyrimidine dehydrogenase deficiency (DPYDD) shows large phenotypic variability, ranging from no symptoms to a convulsive disorder with motor and mental retardation in homozygous patients. In addition, homozygous and heterozygous mutation carriers can develop severe toxicity after the administration of the antineoplastic drug 5-fluorouracil (5FU), which is also catabolized by the DPYD enzyme. This is an example of a pharmacogenetic disorder (Van Kuilenburg et al., 1999). Since there is no correlation between genotype and phenotype in DPD deficiency, it appears that the deficiency is a necessary, but not sufficient, prerequisite for the development of clinical abnormalities (Van Kuilenburg et al., 1999; Enns et al., 2004).

Clinical features

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Imported from Human Phenotype Ontology (HPO)

  • Autism
  • Congenital ocular coloboma
  • Lethargy
  • Microphthalmia
  • Hypertonia
  • Hypotonia
  • Nystagmus
  • Optic atrophy
  • Tetraplegia
  • Seizure
  • Corpus callosum, agenesis of
  • Cerebral atrophy
  • Hyperactivity
  • Delayed speech and language development
  • Growth delay
  • Motor delay
  • Failure to thrive
  • Intellectual disability
  • Uraciluria
  • Reduced dihydropyrimidine dehydrogenase level
  • Microcephaly
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Inheritance pattern

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Autosomal recessive inheritance

Conditions tested

Target population

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Dihydropyrimidine dehydrogenase deficiency, 274270, Autosomal recessive (diagnosis/ clinical suspition/ etiology investigation/ classification)

Citations

Not provided

Clinical validity

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Not provided

Clinical utility

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Not provided

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