Related Experiment Video
Updated: Aug 8, 2026

Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
Published on: June 23, 2015
[Pathologic features and prognosis of 21 children with isolated proteinuria]
Xi-qiang Dang1, Zhu-wen Yi, Xiao-jie He
1Laboratory of Pediatric Nephrology, Second Xiangya Hospital, Central South University, Changsha, China. happydang@tom.com
Insights
Children with isolated proteinuria (IP) show varied renal damage, with most recovering after treatment. However, severe mesangial proliferation glomerulonephritis (MsPGN) and focal segmental glomerulosclerosis (FSGS) indicate a less optimistic prognosis for pediatric kidney health.
Area of Science:
- Pediatric Nephrology
- Renal Pathology
- Glomerular Diseases
Context:
- Isolated proteinuria (IP) in children presents a diagnostic challenge.
- Renal biopsy is crucial for classifying IP and guiding treatment.
- Understanding the spectrum of renal damage in pediatric IP is essential for prognosis.
Purpose:
- To characterize the pathologic features of isolated proteinuria in children.
- To evaluate treatment outcomes and prognosis in pediatric IP.
- To identify risk factors for poor outcomes in children with IP.
Summary:
- Twenty-one children with isolated proteinuria underwent renal biopsy, revealing diagnoses including mesangial proliferation glomerulonephritis (MsPGN), minimal change nephritis (MCN), IgA nephropathy (IgAN), focal segmental glomerulosclerosis (FSGS), and endocapillary proliferative glomerulonephritis (EnPGN).
- Interstitial changes were noted in MsPGN and FSGS.
- Most children responded well to medical treatment, achieving recovery without relapse. However, persistent proteinuria and impaired renal function were observed in severe MsPGN and FSGS cases, highlighting the need for vigilant management and renoprotective strategies.
Impact:
- Provides insights into the diverse histopathological findings in pediatric isolated proteinuria.
- Demonstrates the effectiveness of aggressive therapies for most children with IP.
- Underscores the guarded prognosis for severe MsPGN and FSGS, advocating for early intervention to preserve renal function.
Objective:
To discuss the pathologic features, treatment and prognosis of the children with isolated proteinuria (IP).
Methods:
Twenty-one children with IP were enrolled according to their renal biopsy and were followed up for 0.5 to 10 years.
Results:
Renal biopsy was performed in all children. Among them 13 were mesangial proliferation glomerulonephritis (MsPGN) (including 3 minor, 6 moderate, and 4 severe ones), 2 minimal change nephritis (MCN), 3 IgA nephropathy (IgAN) (1 in Grade I and 2 in Grade II), 2 focal segmemtal glomerulosclerosis (FSGS) and 1 endocapillary proliferative glomerulonephritis (EnPGN). Interstitial changes could be found in MsPGN and FSGS mostly, presenting interstitial fibrosis, infiltration of inflammatory cells, atrophy of renal tubule, and the vacuolar degeneration of epithelia. All children accepted the medical treatment except the EnPGN case. Fifteen children recovered with no relapse; proteinuria persisted in 3 severe MsPGN and FSGS cases; 2 got the impaired renal function accompanied by persistent proteinuria; and 1 had hypertension.
Conclusion:
The different degrees of renal damage can be found in all IP children who have persistent proteinuria. Most patients can get good outcome after aggressive therapies. However, the prognosis of those with severe MsPGN and FSGS was not so optimistic, and some reno-protective treatments should be given to postpone the deterioration of the renal function.
Related Concept Videos
Nephrotic Syndrome II : Assessment and Medical Management
Nephrons
Nephrotic Syndrome I : Introduction
Renal Corpuscle
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Acute Kidney Injury II: Pathophysiology
Acute Kidney Injury III: Clinical Manifestations

