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Crescentic IgA nephropathy, a rare condition, rapidly progresses to end-stage renal failure in affected males. Steroid treatment showed limited efficacy in halting kidney function decline.
Area of Science:
- Nephrology
- Immunopathology
- Renal Medicine
Background:
- Immunoglobulin A (IgA) nephropathy is a common primary glomerulonephritis.
- Crescentic glomerulonephritis is a severe form associated with rapid kidney function decline.
- The specific presentation and outcomes of crescentic IgA nephropathy are not well-defined.
Purpose of the Study:
- To describe the clinical presentation, pathological findings, and outcomes of five male patients with crescentic IgA nephropathy.
- To evaluate the efficacy of corticosteroid treatment in this patient cohort.
Main Methods:
- Case series reporting on five male patients diagnosed with crescentic IgA nephropathy.
- Clinical data including presentation, laboratory values, and renal function progression were collected.
- Renal biopsy findings including light microscopy, immunofluorescence, and electron microscopy were analyzed.
- Treatment with prednisone and methylprednisolone was administered to two patients.
Main Results:
- All five patients were male, aged 16-60, presenting with varying degrees of uremia, nephrotic syndrome, or hematuria.
- All exhibited hypertension, azotemia, significant proteinuria, hypoalbuminemia, and hematuria.
- Renal biopsies consistently showed crescentic glomerulonephritis with IgA deposition.
- Despite treatment, all patients progressed to end-stage renal failure requiring dialysis or experienced death.
Conclusions:
- Crescentic IgA nephropathy is a severe, rapidly progressive form of IgA nephropathy predominantly affecting males.
- The condition frequently leads to end-stage renal failure.
- Current corticosteroid regimens appear to have limited effectiveness in improving renal outcomes.
Abstract:
We report five cases of crescentic IgA nephropathy. All are males, 16-60 years of age. One case each came to medical attention with uremia, nephrotic syndrome, and gross hematuria; two cases presented with microhematuria and proteinuria on routine urinalysis. All had hypertension, azotemia (serum creatinine 1.6-9.4 mg/dl), proteinuria (greater than 6 g/24 hr in four cases), hypoalbuminemia (less than 3 g/dl), and hematuria (gross in two cases). All progressed to end-stage renal failure renal failure ending in dialysis (three cases) or death from unrelated causes (two cases). Prednisone, 60 mg/day for 1 month in two patients (with two 1-g doses of iv methylprednisolone in 1 case) did not improve the serum creatinine level, but one patient subsequently experienced a less rapid fall in renal function. A crescentic glomerulonephritis was present in all biopsies (crescents in 31-80% of glomeruli; mean, 50%). The size and stage of the crescents were variable. Numerous glomeruli had focal or diffuse sclerosis. In all cases, there was a 3 or 4+ deposition of IgA. Low-intensity staining for IgG and IgM was noted in four and three patients, respectively. On electron microscopy, dense granular mesangial deposits were noted in all cases and in four patients capillary subepithelial deposits were also observed. This form of IgA nephropathy is not common, but some studies indicate that it may occur in about 5% of patients with IgA nephropathy.