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Updated: Nov 24, 2025

Generation of Human Kidney Tubuloids from Tissue and Urine
Published on: April 16, 2021
Outcome of primary tubular tubulopathies diagnosed in pediatric age
Cristina Julia Blázquez Gómez1, Helena Gil-Peña1, Flor A Ordóñez Álvarez1
1Hospital Universitario Central de Asturias, Oviedo, Asturias, España.
Insights
Primary tubulopathies in children cause growth issues and potential kidney damage. Early diagnosis and treatment can improve growth outcomes and manage complications, though long-term monitoring is crucial.
Area of Science:
- Pediatric Nephrology
- Genetics
- Rare Diseases
Background:
- Primary tubulopathies are rare genetic disorders typically diagnosed in childhood.
- Advances in genetic diagnostics and therapeutics have significantly impacted their natural history.
- Understanding the clinical spectrum and long-term outcomes is essential for effective management.
Purpose of the Study:
- To describe the clinical spectrum of primary tubulopathies diagnosed in a pediatric nephrology unit.
- To provide long-term follow-up data on growth, renal function, and complications.
- To highlight the impact of genetic defects on disease presentation and progression.
Main Methods:
- An observational study involving 53 patients with genetically confirmed primary tubulopathies.
- Data collection included demographics, clinical manifestations, and laboratory results at diagnosis and during follow-up.
- Specific tubulopathies analyzed included Gitelman syndrome, distal renal tubular acidosis, cystinuria, and others.
Main Results:
- The median age at diagnosis was 5.08 years, with short stature (38%) and metabolic decompensations (40%) as common presentations.
- Long-term follow-up (median 18.92 years) showed significant growth improvement (height SDS from -1.39 to 1.07).
- 32% experienced reduced estimated glomerular filtration rate (<90ml/min/1.73m²), 3 required renal replacement therapy, and extrarenal complications (stones, deafness) were noted.
Conclusions:
- Primary tubulopathies are a diverse group of conditions impacting growth and renal function.
- Treatment can largely reverse growth impairment.
- Patients face risks of reduced kidney function and significant extrarenal complications requiring ongoing management.
Background And Objective:
Primary tubulopathies are rare and usually present at pediatric age. Recent advances in genetic diagnosis and treatment have changed its natural history. This study provides the clinical spectrum of a series of primary tubulopathies diagnosed in a Pediatric Nephrology Unit and to offer long-term follow-up data regarding growth, estimated glomerular filtration and intercurrent complications.
Patients And Methods:
Observational study in 53 patients with primary tubulopathies and identified genetic defect: Gitelman syndrome (36%), distal renal tubular acidosis (15%), cystinuria (11%), X-linked hypophosphatemic rickets (7%), Dent-syndrome Lowe (7%), cystinosis (6%), and 1-2 cases of other tubulopathies. Demographic, analytical and clinical data were collected at diagnosis, during evolution and at the time of the study.
Results:
The age (median and interquartile range) at diagnosis was 5.08 years (1.33-8.50). The most frequent presentation manifestations were metabolic decompensations associated with intercurrent processes (40%) and short stature (38%). Height (mean±SD) was -1.39±1.49 at diagnosis and 1.07±1.54 after a follow-up of 18.92 (6.25-24.33) years. Sixteen (32%) developed an estimated glomerular filtration<90ml / min / 1.73m2. Three patients required replacement renal replacement. Eleven patients had metabolic decompensations that required hospitalization, 9 renal colic and / or kidney stones and 10 mental problems. Six of 8 patients with distal renal tubular acidosis developed sensorineural deafness.
Conclusions:
Primary tubulopathies are a heterogeneous group of diseases that cause growth impairment, largely reversible with treatment, risk of estimated glomerular filtration reduction and significant extrarenal complications derived or associated.
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