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Abstract:
A series of 150 samples of renal tissue obtained by needle biopsy from patients with haematuria were examined immunohistologically. In 15 cases mesangial deposits of IgA were demonstrated. In most cases they were young patients in whom no hypertension, oedema or laboratory findings indicating renal damage could be detected one year later during a follow-up examination. Electron microscopical examination was carried out in the renal tissue of 7 such cases, and showed dense mesangial deposits and a marked subendothelial rarefaction within the basement membrane. The light microscopical findings were variable. Three cases showed minimal lesions, 5 mesangial proliferative glomerulonephritis and 7 mesangial proliferative glomerulonephritis with focal segmental sclerotic alterations within the glomeruli.
Insights
Immunohistology revealed immunoglobulin A (IgA) deposits in 15 patients with haematuria. Most were young, asymptomatic individuals, suggesting IgA nephropathy may present subtly in early stages.
Area of Science:
- Nephrology
- Immunopathology
- Histopathology
Context:
- Haematuria is a common urological symptom.
- Immunohistology is crucial for diagnosing renal diseases.
- IgA nephropathy is the most common primary glomerulonephritis worldwide.
Purpose:
- To investigate the prevalence and characteristics of mesangial IgA deposits in patients with haematuria.
- To correlate immunohistological findings with clinical presentation and long-term outcomes.
- To examine ultrastructural changes in cases with IgA deposits.
Summary:
- 150 renal tissue samples from patients with haematuria were analyzed. 15 cases showed mesangial IgA deposits.
- Most affected patients were young and asymptomatic at one-year follow-up.
- Electron microscopy revealed dense mesangial deposits and subendothelial rarefaction. Light microscopy showed minimal lesions, mesangial proliferative glomerulonephritis, or focal segmental glomerulosclerosis.
Impact:
- Highlights the potential for IgA nephropathy to be present in young, asymptomatic patients with haematuria.
- Emphasizes the diagnostic value of immunohistology in evaluating renal biopsies.
- Provides insights into the histopathological spectrum of IgA nephropathy.