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Dihydropyrimidine dehydrogenase deficiency

Disease definition

A rare disorder of pyrimidine metabolism characterized by a variable phenotype ranging from absence of symptoms to severe neurological involvement with developmental delay, intellectual disability, and seizures. Additional signs and symptoms may include hypotonia, microcephaly, ocular abnormalities (such as microphthalmia, nystagmus, and strabismus), and autistic behavior, among others. Analysis of urine typically shows high levels of uracil and thymine. Patients are at risk of suffering from severe toxicity after the administration of the anti-neoplastic agent 5-fluorouracil.

ORPHA:1675

Classification level: Disorder
  • Synonym(s):
    • Familial pyrimidinemia
  • Prevalence: Unknown
  • Inheritance: -
  • Age of onset: All ages
  • ICD-10: E79.8
  • ICD-11: 5C55.1
  • OMIM: 274270
  • UMLS: C1959620
  • MeSH: D054067
  • GARD: 19
  • MedDRA: 10052622

  A summary on this disease is available in Español (2021) Français (2021) Nederlands (2021)

Additional information

Further information on this disease

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The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.