Luisa Serpa Pinto, Nuno Jorge Lamas, Ana Campar, Alvaro Ferreira, Ana Rita Cruz
Immunoglobulin G4 related-disease (IgG4-RD) is a multisystemic immune-mediated fibroinflammatory disease, with a strong predilection for salivary and lacrimal glands, pancreas, biliary tree, lungs, kidneys, aorta, and retroperitoneum. In the case of pancreatic involvement, it manifests as autoimmune pancreatitis. Patients with IgG4-RD usually have mild to moderate eosinophilia in the peripheral blood, however, they may present a secondary hypereosinophilic syndrome (HES). Although there are cases described with severe eosinophilia (> 5,000/µL), the 2019 American College of Rheumatology/European League Against Rheumatism classification criteria for IgG4-RD considers peripheral eosinophilia above 3,000/µL as an exclusion criterion, although stating that assessment for the presence of exclusion criteria should be individualized depending on a patient's clinical scenario...
March 2021: Journal of Medical Cases