Endocrine Abstracts

Background: Graves disease with elevated Immunoglobulin G4 serum concentration is a novel subtype of Graves disease (GD), which seems to be particularly associated with Graves orbitopathy (GO). It occurs in 17.6% of patients with GO and 5.4% of patients with GD without GO. In this study, we compare multiple magnetic resonance imaging (MRI) features of GO with elevated IgG4 serum concentration (IgG4-GO) with the classic GO subtype without IgG4 elevation. No such research has be...