Acute Renal Failure due to Thrombotic Microangiopathy in Patient with Scleroderma: Autopsy Case Report.

This study presents a patient who died of acute renal failure (ARF) as a complication of scleroderma. The patient remained normotensive throughout the clinical course. Myeloperoxidase-anti-neutrophil cytoplasmic antibody was negative. Autopsy revealed fibrin thrombi in the glomerular capillaries and afferent arterioles, mesangiolysis, and double contour of the glomerular basement membrane. Contrarily, "onionskin lesions" of renal interlobular arteries, the histological hallmark of scleroderma renal crisis, were not discovered. These findings suggested that thrombotic microangiopathy (TMA) was the cause of ARF. Although the frequency is not high, close monitoring should be given to TMA in scleroderma because of possible mortality.