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Henoch-Schönlein syndrome and selective IgA deficiency
Archives of Disease in Childhood
|February 1, 1985
Summary
This study details a child with Henoch-Schönlein purpura and hematuria, who was diagnosed with selective IgA deficiency and glomerulonephritis without IgA deposits.
Area of Science:
- Pediatric Nephrology
- Immunology
- Rheumatology
Background:
- Henoch-Schönlein purpura (HSP) is a common childhood vasculitis.
- It typically involves the skin, joints, gastrointestinal tract, and kidneys.
- Renal involvement in HSP often presents as IgA nephropathy.
Observation:
- A 9-year-old girl presented with HSP symptoms and macroscopic hematuria.
- Laboratory tests revealed selective immunoglobulin A (IgA) deficiency.
- Renal biopsy was performed to investigate kidney involvement.
Findings:
- The renal biopsy showed mesangial proliferative glomerulonephritis.
- Immunofluorescence revealed diffuse granular deposits of complement component 3 (C3).
- Notably, IgA deposits were absent in the renal biopsy.
Implications:
- This case highlights a rare presentation of HSP with selective IgA deficiency and glomerulonephritis.
- The findings challenge the typical understanding of IgA's role in HSP-related kidney disease.
- Further research is needed to elucidate the pathogenesis of HSP in IgA-deficient individuals.