Acute nephritis (acute nephritic syndrome) is a syndrome that may develop in some patients with acute glomerulonephritis. Renal biopsy with serologic testing for infectious and autoimmune disorders is needed to determine the cause.


Clinical features:

(1) acute onset

(2) discolored urine with a "smoky" appearance

(3) variable hypertension

(4) variable oliguria

(5) edema may be present or absent


General laboratory features

(1) moderate to marked proteinuria without development of nephrotic syndrome

(2) hematuria with red blood cell casts in the urine sediment

(3) elevations in BUN and creatinine


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