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Light chain nephropathy in a 19-month-old boy with AIDS
T Shimamura1, L S Weiss, J A Walker
1Department of Pathology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway 08854.
Acta Pathologica Japonica
|July 1, 1992
Summary
A rare case of light chain nephropathy, a kidney disease, was diagnosed in a 19-month-old boy with acquired immunodeficiency syndrome (AIDS). This finding highlights an unusual presentation of kidney disease in pediatric AIDS patients.
Area of Science:
- Nephrology
- Immunology
- Pediatric Pathology
Background:
- Acquired immunodeficiency syndrome (AIDS) can manifest with various renal complications.
- Light chain nephropathy is a kidney disease characterized by immunoglobulin light chain deposition.
Observation:
- A 19-month-old boy diagnosed with AIDS presented with unexplained proteinuria.
- Renal biopsy was performed to investigate the cause of proteinuria.
Findings:
- Microscopic examination revealed increased mesangial matrix, mesangial hypercellularity, and nodular sclerosis.
- Immunofluorescence showed glomerular deposits of kappa and lambda light chains.
- Deposits of kappa light chains were observed in arteriolar walls and capillary basement membranes.
- Quantitative analysis confirmed extremely high urinary concentrations of kappa light chain, confirming light chain nephropathy.
Implications:
- This case represents a rare occurrence of light chain nephropathy in childhood.
- The co-occurrence with AIDS suggests a potential link or specific susceptibility in pediatric patients.
- Highlights the importance of renal biopsy in diagnosing unexplained proteinuria in pediatric AIDS.