Peripheral gangrene complicating idiopathic and recessive hemolytic uremic syndromes.

Three patients with hemolytic uremic syndrome (HUS) developed peripheral gangrene. Bilateral carotid artery thromboses occurred in one of these patients after recovery from HUS. One patient had a long history of juvenile rheumatoid arthritis. In the second patient, a flu-like illness preceded the onset of HUS. The third was one of two sisters, with the HUS appearing more than 1 year apart. None had evidence of disseminated intravascular coagulation or infection with Streptococcus pneumoniae. The patient with rheumatoid arthritis had renal cortical necrosis but recovered moderate renal function after treatment with dialysis and plasmapheresis for 6 months. The child with a genetic form of HUS died of renal failure and had massive cortical necrosis and vascular thrombosis at autopsy. This is the first report of peripheral gangrene in children with idiopathic HUS and autosomal recessive HUS.