A case of immunoglobulin G4-related aortic diseases.

A 65-year-old man had histories of retroperitoneal fibrosis, membranous nephropathy, and acute coronary syndrome. Chest computed tomography showed an enlarged ascending aorta and type B aortic dissection, and he underwent ascending aorta and arch replacement. A pathological examination of the resected aorta showed immunoglobulin G4-positive plasma cell infiltration.