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Measurement of 4-hydroxyphenylacetic aciduria as a screening test for small-bowel disease
Insights
Urinary 4-hydroxyphenylacetic acid measurement effectively screens for small-bowel diseases and bacterial overgrowth syndromes in children. This method shows high accuracy with minimal false results, aiding early diagnosis.
Area of Science:
- Pediatrics
- Gastroenterology
- Clinical Chemistry
Background:
- Small-bowel diseases and bacterial overgrowth syndromes present diagnostic challenges in acutely ill children.
- Early and accurate diagnosis is crucial for effective management and improved patient outcomes.
Purpose of the Study:
- To evaluate the utility of urinary 4-hydroxyphenylacetic acid as a non-invasive screening tool.
- To assess the diagnostic accuracy of this biomarker in pediatric patients with suspected small-bowel conditions.
Main Methods:
- A study involving 360 acutely ill infants and children.
- Comparison with control groups of healthy children and infants.
- Analysis of urinary 4-hydroxyphenylacetic acid levels in patients with and without small-bowel disease.
Main Results:
- The measurement demonstrated a low false-positive rate (2%) and no false-negative results.
- Abnormal levels were detected in patients with Giardia lamblia, ileal resection with blind loop, and other small-bowel bacterial overgrowth conditions.
- The analyte's excretion correlated with the presence of specific small-bowel pathologies.
Conclusions:
- Urinary 4-hydroxyphenylacetic acid is a valuable biomarker for screening pediatric patients for small-bowel disease.
- This screening method can aid in the early identification of bacterial overgrowth syndromes.
- The findings support the integration of this test into diagnostic algorithms for pediatric gastrointestinal disorders.
Abstract:
We evaluted measurement of urinary 4-hydroxyphenyl acetic acid as a potential screening method for small-bowel disease and bacterial overgrowth syndromes in 360 unselected acutely ill infants and children. Control data were obtained on 120 healthy children, ages 1.5 to 15 years, from a general medical practice, 48 healthy infants, ages one to five years, from local day nurseries, and 150 healthy babies, ages less than one to eight days. Comparative data were from 300 acutely ill hospitalized babies and children, ranging in age from less than one day to 15 years and without clinical evidence for small-bowel disease and bacterial overgrowth syndrome. No false-negative results and only 2% false-positive results were observed. Among the 10 patients whose urinary excretion of the analyte was considered to be abnormal were patients with Giardia lamblia infestation, ileal resection with blind loop, and other diseases of the small intestine associated with bacterial overgrowth. We conclude that measurement of 4-hydroxyphenylacetic acid excretion is useful in screening for such diseases.