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Nephrotic syndrome associated with diffuse mesangial hypercellularity: is it a heterogeneous disease entity?
K Joh1, N Matsuyama, Y Kanetsuna
1Department of Pathology, Jikei University School of Medicine, Tokyo, Japan.
American Journal of Nephrology
|June 17, 1998
Summary
Diffuse mesangial hypercellularity (DMH) is a rare cause of nephrotic syndrome. Follow-up biopsies reveal distinct disease entities and prognostic indicators, highlighting the importance of monitoring mesangial hypercellularity progression.
Area of Science:
- Nephrology
- Pathology
- Pediatric Nephrology
Background:
- Diffuse mesangial hypercellularity (DMH) is a rare primary glomerulonephritis.
- It is often associated with idiopathic nephrotic syndrome (INS).
- Understanding DMH variants and their prognostic significance is crucial for patient management.
Purpose of the Study:
- To evaluate the clinical course and pathological findings of DMH.
- To identify potential prognostic indicators within DMH variants.
- To determine if DMH represents heterogeneous disease entities.
Main Methods:
- Retrospective analysis of 15 patients with DMH and INS.
- Inclusion of 5 patients with repeated biopsy specimens.
- Clinical follow-up ranging from 0.9 to 17.5 years.
Main Results:
- Four patients initially diagnosed with DMH later developed focal segmental glomerulosclerosis (FSGS) on repeat biopsy.
- Minimal-change nephrotic syndrome (MCNS) variant showed varied responses to steroid therapy, with one patient progressing to end-stage renal disease (ESRD).
- The FSGS variant also showed progression to ESRD in one patient.
- Increased mesangial hypercellularity correlated with proteinuria and hematuria severity.
Conclusions:
- DMH may comprise heterogeneous disease entities despite similar initial biopsy findings.
- Follow-up biopsies are essential to identify variants and assess the degree of DMH.
- Recognizing DMH variants and their severity serves as a critical prognostic indicator for kidney disease progression.