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Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
Pauci-immune lupus nephritis: a case report
Fei-Ching Li1, Daw-Yang Hwang, Chi-Chih Hung
1Department of Nephrology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
The Kaohsiung Journal of Medical Sciences
|February 3, 2009
Summary
This study details a rare case of diffuse proliferative lupus nephritis with minimal immune deposits in a young woman. Prompt treatment with corticosteroids led to significant improvement in kidney function and symptoms.
Area of Science:
- Nephrology
- Immunology
- Rheumatology
Background:
- Systemic lupus erythematosus (SLE) can cause lupus nephritis, a serious kidney complication.
- Diffuse proliferative lupus nephritis is the most common and severe form, typically associated with immune complex deposition.
Observation:
- A 26-year-old female with SLE presented with severe kidney injury (creatinine 6.7 mg/dL) and edema.
- Renal biopsy showed diffuse proliferative glomerulonephritis but lacked typical immune deposits on immunofluorescence and electron microscopy.
- Serological tests were negative for anti-dsDNA, anti-PR3, anti-MPO antibodies, and lupus anticoagulant, despite a positive antinuclear antibody titer.
Findings:
- The patient was diagnosed with a rare variant of diffuse proliferative lupus nephritis characterized by minimal immune deposits.
- Treatment with high-dose corticosteroids (methylprednisolone and prednisolone) resulted in improved renal function (creatinine decreased to 4.7 mg/dL) and resolution of dyspnea.
Implications:
- This case highlights the importance of considering atypical presentations of lupus nephritis, even in the absence of classic serological markers or immune deposits.
- The findings suggest that diffuse proliferative lupus nephritis with minimal deposits may have distinct pathomechanisms and can be responsive to immunosuppressive therapy.
- Further research into the differential diagnosis, underlying mechanisms, and optimal treatment strategies for this rare lupus nephritis variant is warranted.
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