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[Phenylketonuria in spite of screening]
P D Maaswinkel-Mooij1, J E Kist-van Holthe tot Echten, J A Maat-Kievit
1Afd. Kindergeneeskunde, Academisch Ziekenhuis, Leiden.
Nederlands Tijdschrift Voor Geneeskunde
|August 21, 1993
Summary
Phenylketonuria (PKU) is a rare genetic disorder. Early diagnosis through neonatal screening is crucial, as delayed detection can lead to psychomotor retardation.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Phenylketonuria (PKU) is an inherited metabolic disorder.
- Neonatal screening programs aim for early detection and intervention.
- Untreated PKU can lead to severe intellectual disability and developmental delays.
Observation:
- A case report of a girl diagnosed with PKU at 6.5 years old.
- The patient exhibited psychomotor retardation.
- Previous diagnostic investigations were not performed due to presumed early screening.
Findings:
- The diagnosis of PKU was established late in childhood.
- The patient's initial screening test for PKU reportedly yielded a false-negative result.
- Since 1974, four children have been identified with false-negative newborn screening results for PKU.
Implications:
- Highlights the critical importance of accurate and sensitive newborn screening for PKU.
- Underscores the potential for false-negative results in neonatal screening programs.
- Emphasizes the need for continued vigilance and follow-up in diagnosing metabolic disorders like PKU.