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Updated: Jun 13, 2026

Implementation of Non-invasive Point of Care Transient Elastography for Evaluation of Liver Disease in Pediatric Populations with Cystic Fibrosis
Published on: August 29, 2025
Renal impairment in children with cystic fibrosis
Annick Andrieux1, Jérôme Harambat, Stéphanie Bui
1CHU de Bordeaux, Centre de Ressources et de Compétences de la Mucoviscidose pédiatrique, Hôpital Pellegrin Enfants, Bordeaux, France.
Insights
Children with cystic fibrosis (CF) show low renal impairment but an increased risk of kidney stones. Further research is needed to accurately assess kidney function in CF patients.
Area of Science:
- Pediatric Nephrology
- Cystic Fibrosis Research
- Renal Function Assessment
Background:
- Increasing life expectancy in cystic fibrosis (CF) leads to a higher incidence of comorbidities, including renal impairment.
- Renal function monitoring is crucial in pediatric CF patients due to potential long-term complications.
Purpose of the Study:
- To investigate the prevalence of renal disease in children with cystic fibrosis.
- To identify risk factors associated with renal impairment in this population.
Main Methods:
- A retrospective analysis of 112 pediatric CF patients was conducted.
- Evaluated were estimated glomerular filtration rate (GFR), microalbuminuria, and lithiasic risk factors.
- Genetic, clinical, and therapeutic data were collected and analyzed.
Main Results:
- Median GFR (Schwartz) remained relatively stable across age groups (1-15 years).
- Microalbuminuria was detected in 22/38 patients; hyperoxaluria in 58/83, linked to severe genotype, pancreatic insufficiency, and liver disease.
- Abnormalities in hypercalciuria, hyperuricuria, and hypocitraturia were also observed.
Conclusions:
- Renal impairment in CF presents diversely, with generally low levels detected in pediatric patients.
- A significant risk for oxalocalcic urolithiasis exists in CF children.
- The Schwartz formula may underestimate GFR; further studies with measured GFR are recommended.
Background:
Due to the improvement in life expectancy in cystic fibrosis (CF), co-morbidities such as renal function impairment may be more frequent.
Aim:
To determine the prevalence of renal disease in children with CF and to identify associated risk factors.
Methods:
A single-center retrospective study analyzing the genetic, clinical and therapeutic characteristics of 112 children. The estimated glomerular filtration rate (GFR), microalbuminuria and lithiasic risk factors were assessed.
Results:
The median calculated GFR (Schwartz) was 123, 161 and 155ml/min/1.73m(2) in children aged 1, 6 and 15years, respectively. The cumulative dose of aminoglycosides was not correlated to GFR. Microalbuminuria was present in 22/38 patients. Hyperoxaluria was observed in 58/83 patients and was associated with a severe genotype, pancreas insufficiency and liver disease. Hypercalciuria, hyperuricuria and hypocitraturia were identified in 16/87, 15/83 and 57/76 patients, respectively.
Conclusion:
Renal impairment in CF has various presentations. There appears to be low levels of renal impairment in children with CF. However, the risk of oxalocalcic urolithiasis is enhanced, and GFR may be underestimated by the Schwartz formula. Further studies using measured GFR techniques are thus warranted.
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