... immunoglobulin G4 (IgG4)-rich lymphoplasmacy-tic infiltration. The pancreas, biliary tree, salivary glands,retroperitoneum, lymph nodes and kidneys can beinvolved in this systemic fibrotic condition ... cor-ticosteroid therapy. A thorough evaluation byexperienced multi-disciplinary team is critical in diag-nosing AIP, especially in young patients. Clinical suspi-cion of the entity is critical. Clinical ... USA.4Division of Hematology and Oncology & Departmentof Medicine, College of Human Medicine, Michigan State University, EastLansing, MI, USA.5Department of Hematology and Medical Oncology, WestMichigan...