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Hereditary nephritis mimicking immune complex-mediated glomerulonephritis
Samih H Nasr1, Glen S Markowitz, Carl S Goldstein
1Department of Pathology, Columbia University College of Physicians and Surgeons, New York, NY 10023, USA. sn386@columbia.edu
Human Pathology
|May 2, 2006
Summary
Hereditary nephritis can present with electron-dense deposits, mimicking immune complex glomerulonephritis. This study highlights these unusual findings, expanding the diagnostic spectrum for hereditary nephritis.
Area of Science:
- Nephrology
- Pathology
- Genetics
Background:
- Hereditary nephritis typically shows glomerular basement membrane abnormalities without electron-dense deposits or positive immunofluorescence.
- Immune complex-mediated glomerulonephritis is characterized by electron-dense deposits and positive immunofluorescence.
Purpose of the Study:
- To report unusual cases of hereditary nephritis mimicking immune complex glomerulonephritis.
- To expand the understanding of pathological findings in hereditary nephritis.
Main Methods:
- Electron microscopy to identify glomerular electron-dense deposits.
- Immunofluorescence to detect immune reactant deposition.
- Immunohistochemistry for collagen IV alpha5 subunit and Goodpasture's antigen.
Main Results:
- Five cases of hereditary nephritis exhibited significant glomerular electron-dense deposits.
- Positive immunofluorescence for IgG was observed in four cases.
- Deposits were predominantly mesangial and intramembranous, entrapped within thickened basement membranes.
Conclusions:
- Hereditary nephritis can present with findings that mimic immune complex glomerulonephritis.
- These cases expand the pathological spectrum of hereditary nephritis.
- Accurate diagnosis requires considering hereditary nephritis even with immune deposit-like features.