Related Experiment Videos
Growth retardation and renal osteodystrophy in children with chronic renal failure
Insights
In children with chronic kidney disease, delayed skeletal maturation significantly impacts height. Severe renal osteodystrophy may worsen growth, but milder bone disease does not appear to cause growth failure.
Area of Science:
- Pediatric Nephrology
- Endocrinology
- Skeletal Biology
Background:
- Chronic kidney disease (CKD) affects growth in children.
- Growth retardation is a common complication in pediatric CKD.
- The role of bone disease in CKD-related growth failure requires further elucidation.
Purpose of the Study:
- To investigate the relationship between height, glomerular filtration rate (GFR), bone age delay, and bone histology in children with CKD.
- To determine the factors influencing height standard deviation scores in pediatric CKD patients.
- To assess the impact of renal osteodystrophy on growth in children with varying GFR levels.
Main Methods:
- Studied 47 children with CKD and GFR < 80 ml/min/1.73 m2.
- Analyzed height standard deviation scores (SDS) for chronological and bone age.
- Utilized multiple regression analysis to identify significant factors affecting height, including GFR and bone age delay.
- Assessed bone histology and correlated findings with GFR and height.
Main Results:
- Glomerular filtration rate (GFR) and bone age delay were significant predictors of height in children with CKD.
- 40% of children had short stature (height SDS < -2) for chronological age.
- Renal osteodystrophy, present at GFR < 30 ml/min/1.73 m2, significantly impacted height only in severe congenital cases (GFR < 20 ml/min/1.73 m2).
- Histological bone disease was equally prevalent in short and tall children, suggesting delayed skeletal maturation is a primary driver of height retardation.
Conclusions:
- Delayed skeletal maturation is a major contributor to height retardation in children with chronic renal failure.
- Severe renal osteodystrophy can exacerbate growth failure in advanced CKD.
- Milder forms of bone disease, detectable only histologically, are unlikely to be the primary cause of growth failure in pediatric CKD.
Abstract:
Height, expressed as standard deviation scores for chronological age and for bone age, was studied in relation to glomerular filtration rate, bone age delay, and bone histology in 47 children with chronic renal disease and GFR less than 80 ml/min/1.73 m2. In multiple regression in all 47 patients, only GFR and bone age delay significantly affected height; 40% of children were short (height standard deviation score less than -2) for chronological age, and 9% were short for bone age. Renal osteodystrophy, which only occurred at GFR less than 30 ml/min/1.73 m2, significantly affected height only in children with congenital renal disease and GFR less than 20 ml/min/1.73 m2. Although radiological and biochemical changes of renal osteodystrophy were seen more often in short children, histological bone disease occurred just as frequently in tall children as in short children. Thus much of the observed height retardation in chronic renal failure is associated with delayed skeletal maturation. In addition, although severe renal osteodystrophy may contribute to growth retardation in advanced renal failure, our data suggest that milder degrees of bone disease evident only on histological study cannot be implicated in the etiology of growth failure in chronic renal impairment.