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Published on: June 24, 2020
Fecal pancreatic elastase in infants under 2 years of age
N A Benahmed1, D Manene, L Barbot
1Laboratoire de coprologie fonctionnelle, APHP, Groupe hospitalier Pitié-Salpêtrière, Paris.
Insights
Fecal elastase testing in infants can miss pancreatic insufficiency. A single test may not be enough, and follow-up measurements are crucial for accurate diagnosis and timely treatment.
Area of Science:
- Pediatrics
- Gastroenterology
- Biochemistry
Background:
- Fecal pancreatic elastase is routinely used to detect pancreatic insufficiency in infants, particularly those with cystic fibrosis or poor growth.
- Limited data exist on the reliability of a single fecal elastase measurement in this population.
Purpose of the Study:
- To evaluate the diagnostic value of serial fecal elastase measurements in infants over the first two years of life.
- To determine if a single fecal elastase test adequately assesses pancreatic status in infants.
Main Methods:
- Retrospective analysis of fecal elastase measurements in 236 infants.
- Follow-up of elastase levels during the first two years of life.
Main Results:
- Initially normal elastase (>200 microg/g) was observed in 51.7% of infants; 14.8% of these later showed insufficiency.
- Initially low elastase (<200 microg/g) normalized in 45.6% of infants.
Conclusions:
- Serial fecal elastase measurements are important for accurate diagnosis of pancreatic insufficiency in infants.
- A single fecal elastase measurement may not exclude pancreatic insufficiency, necessitating further testing.
Objectives And Methods:
Fecal pancreatic elastase determination is of routine use in infant population presenting with a neonatal diagnosis of cystic fibrosis and in those with poor weight gain and growth, in order to precociously detect pancreatic insufficiency. However, there are few data regarding the value of one spot measure of elastase to assess pancreatic status in this population. This retrospective study reports the follow-up of fecal elastase measurement in 236 infants during the 2 first years of life.
Results:
Fecal elastase was over 200 microg/g (i.e. normal cut-off) in a first sample in 122 patients (51.7% of patients) and below 200 microg/g in the remaining 114 patients. An alteration of elastase concentration was then observed in 18/122 infants (14.8%), leading to the diagnosis of pancreatic insufficiency at the end of the follow-up. In contrast, a normalization of fecal elastase was observed in 52 (45.6%) infants presenting with a first measurement below normal cut-off.
Conclusion:
This study shows that special attention should be given to the analysis of fecal elastase concentrations in infants as a precocious diagnosis of pancreatic insufficiency is crucial for the early introduction of a pancreatic enzyme replacement therapy which will prevent further consequence of malabsorption. One spot measure does not totally exclude pancreatic insufficiency in this population and a further control measurement of fecal elastase may be necessary.
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