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Mesangial IGM in minimal change glomerular disease: a clinicopathological study in a Malaysian population
Abstract:
During a 6 yr period, 105 (69%) of 153 patients in whom a histological diagnosis of minimal change glomerular disease was made had renal biopsy tissue suitable for immunofluorescence examination. Thirty seven (35%) patients showed glomerular mesangial deposits of IgM. All the patients presented with the nephrotic syndrome. We found no significant difference in age and sex prevalence, presentation, response to therapy and glomerular morphology between IgM positive and IgM negative groups. This study suggests that there is no necessity to categorize IgM positive minimal change glomerular disease as a separate entity.
Insights
Minimal change glomerular disease with IgM deposits is not a distinct entity. Immunofluorescence findings of IgM in minimal change disease do not alter patient presentation, treatment response, or outcomes.
Area of Science:
- Nephrology
- Immunopathology
- Glomerular Diseases
Background:
- Minimal change glomerular disease (MCGD) is a common cause of nephrotic syndrome in children and adults.
- Immunofluorescence microscopy is crucial for diagnosing glomerular diseases, but its role in MCGD subtypes is debated.
- Glomerular mesangial deposits of immunoglobulin M (IgM) are sometimes observed in MCGD.
Purpose of the Study:
- To investigate the clinical significance of glomerular mesangial IgM deposits in patients diagnosed with minimal change glomerular disease.
- To determine if IgM positivity in MCGD necessitates classification as a separate clinicopathological entity.
Main Methods:
- Retrospective analysis of renal biopsy tissues from 153 patients with histological diagnosis of MCGD over a 6-year period.
- Immunofluorescence examination was performed on 105 suitable biopsy samples.
- Clinical data, including presentation, response to therapy, and glomerular morphology, were compared between IgM-positive and IgM-negative groups.
Main Results:
- Of 105 patients with suitable tissue, 37 (35%) exhibited glomerular mesangial IgM deposits.
- All patients presented with nephrotic syndrome.
- No significant differences were observed in age, sex, clinical presentation, therapeutic response, or glomerular morphology between IgM-positive and IgM-negative patients.
Conclusions:
- The presence of glomerular mesangial IgM deposits in minimal change glomerular disease does not appear to be a clinically significant finding.
- Current evidence does not support categorizing IgM-positive minimal change glomerular disease as a distinct entity.
- Routine immunofluorescence for IgM may not be necessary for classifying or managing patients with minimal change glomerular disease.