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Galactosemia detection from phenylketonuria screening

M J Henderson1, L Shapiro, C McCowan

  • 1Department of Chemical Pathology, St. James's University Hospital, Leeds, U.K.

Clinical Chemistry
|January 1, 1988
PubMed

Insights

Classical galactosemia diagnosis was suggested by elevated blood-spot phenylalanine. Early dietary management prevented a metabolic crisis in a clinically unaffected infant, highlighting a key diagnostic indicator.

Area of Science:

  • Biochemistry
  • Genetics
  • Pediatrics

Background:

  • Classical galactosemia is a rare inherited metabolic disorder.
  • It results from deficiency in the enzyme galactose-1-phosphate uridyltransferase.
  • Early diagnosis and management are crucial to prevent severe complications.

Observation:

  • A case of classical galactosemia is presented.
  • The initial diagnostic clue was a moderately increased phenylalanine concentration in a blood sample.
  • The infant was clinically well at the time of sample collection.

Findings:

  • Elevated blood-spot phenylalanine can be an early indicator of classical galactosemia.
  • Prompt dietary intervention, specifically galactose restriction, is effective.
  • This intervention averted a potential metabolic crisis.

Implications:

  • Increased phenylalanine may serve as a screening marker for galactosemia.
  • Neonatal screening protocols could be refined to include this observation.
  • Timely diagnosis and management significantly improve patient outcomes.

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