Secondary IgA nephropathy presenting as nephrotic syndrome with glomerular crescentic changes and acute renal failure in a patient with autoimmune hepatitis.

Patients with end-stage liver disease are prone to hemodynamic and immunologic renal injury, the latter at times manifesting as glomerulonephritis. Elevated serum immunoglobulin A (IgA) levels and mesangial IgG-IgA deposits are common in these patients, but are often clinically silent. We report a patient with autoimmune hepatitis and secondary IgA nephropathy (IgAN) who presented with nephrotic syndrome, acute renal failure (ARF), with 30% of the renal glomeruli having undergone crescentic change, and with IgA2 deposits in the glomerular mesangium. This article discusses secondary IgAN pathogenesis and its therapeutic management.