Endothelial antibodies (EAB) were determined by enzyme immunoassay in
39 patients with Sneddon syndrome. EAB were detected in 12 patients (3
1%). Antibodies to phospholipids occurred more frequently in EAB-posit
ive patients, Clinically, EAB-positive and EAB-negative patients were
similar except renal syndrome which in the form of proteinuria was mor
e frequent in EAB-positive subjects.