Nephritic syndrome

**Definition:** Sudden onset of glomerular disease usually with severe (macroscopic/visible) haematuria accompanied by oliguria, elevated blood pressure, mild oedema and albuminuria or proteinuria usually of sub-nephrotic range. May be a cause of acute renal failure in which case the syndrome is termed rapidly progressive nephritis. Nephritic syndrome has many possible causes and is associated with renal light microscopic changes such hypercellularity, necrosis or thrombosis.

**Inclusions:** - acute nephritis

**Exclusions:** - Tubulo-interstitial nephritis, not specified as acute or chronic