Figure 833

Outcome of acute renal failure (ARF). Long-term outcome of ARF has been studied only in some series of intrinsic or parenchymatous ARF. The figure shows the different long-term prognoses for intrinsic ARF of various causes. Left, The percentages of recovery rate of renal function 1 year after the acute episode of renal failure. Right, The situation of renal function 5 years after the ARF episode. Acute tubulointerstitial nephritis (TIN) carries the better prognosis: the vast majority of patients had recovered renal function after 1 and 5 years. Two thirds of the patients with acute tubule necrosis (ATN) recovered normal renal function, 31% showed partial recovery, and 6% experienced no functional recovery. Some patients with ATN lost renal function over the years. Patients with ARF due to glomerular lesions have a poorer prognosis; 24% at 1 year and 47% at 5 years show terminal renal failure. The poorest evolution is observed with severe forms of acute cortical necrosis or hemolytic-uremic syndrome. GN—glomerulonephritis; HUS— hemolytic-uremic syndrome; ACN—acute cortical necrosis. (Data from Bonomini et al. [37].)

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