Department of Pathology The Affiliated Hospital of Qingdao University Qingdao 266000 Shandong Province China;
Department of Abdominal Ultrasound The Affiliated Hospital of Qingdao University Qingdao 266000 Shandong Province China;
Department of Hematology The Affiliated Hospital of Qingdao University Qingdao 266000 Shandong Province China;
Department of Hematology The Affiliated Hospital of Qingdao University Qingdao 266000 Shandong Province China;
IgG4-associated disease; Castleman disease; Lymphadenopathy; Orbital neoplasm; Pathological morphology; Case report;