• Glomerulonephritis can be classified according to the clinical syndrome it produces, the pathological appearance on a renal biopsy, or where known, the underlying cause or disease.
• Clinical features can include haematuria, proteinuria, hypertension, oedema and renal impairment.
• A focal glomerulonephritis affects some but not all the glomeruli, a diffuse glomerulonephritis affects all the glomeruli.
• A segmental glomerulonephritis affects just a portion within the affected glomeruli, a global glomerulonephritis affects all portions of affected glomeruli.

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C. A. O'Callaghan 2004