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Type: Journal article
Title: Urine amino and organic acids analysis in developmental delay or intellectual disability
Author: Poplawski, N.
Harrison, J.
Norton, W.
Wiltshire, E.
Fletcher, J.
Citation: Journal of Paediatrics and Child Health, 2002; 38(5):475-480
Publisher: Blackwell Science Asia
Issue Date: 2002
ISSN: 1034-4810
Abstract: <h4>Objectives</h4>To determine the proportion of urine amino and organic acids screening tests (UMS) undertaken for patients referred with developmental delay or intellectual disability (DD/ID), and within the group with DD/ID, to determine the diagnostic yield, the proportion of diagnoses with a therapy and the associated recurrence risks.<h4>Methods</h4>A retrospective review of request forms and results of UMS, in individuals older than 28 days, referred to the Women's and Children's Hospital, North Adelaide, between 1 January 1992 and 31 December 1998 was carried out. Urine was analysed by ion exchange chromatography (amino acids), gas chromatography/mass spectrometry (organic acids), colorimetric assay (orotic acid) and stable isotope-dilution mass spectrometry (trimethylamine).<h4>Results</h4>A total of 3316 samples were received, 1447 being from patients with DD/ID. A diagnosis was determined for 1.8% of all referrals. For patients with DD/ID, the diagnostic yield was 1.1%, with a similar yield for isolated DD/ID and DD/ID with other features (9/828 vs 7/619; chi2 = 0.006; P = 0.93). Specific therapies were available for 69% of diagnoses associated with DD/ID and 87.5% had known Mendelian or mitochondrial inheritance.<h4>Conclusion</h4>Urine metabolic screening is an important part of the evaluation of children with DD/ID as it can enable families to make reproductive decisions and children to receive appropriate therapy early.
Keywords: Humans; Orotic Acid; Amino Acids; Chromatography, Ion Exchange; Retrospective Studies; Developmental Disabilities; Child; Child, Preschool; Infant; Female; Male; Gas Chromatography-Mass Spectrometry; Intellectual Disability
RMID: 0020021006
DOI: 10.1046/j.1440-1754.2002.00032.x
Appears in Collections:Paediatrics publications

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