A case of multiple immunoglobulin G4–related periarteritis: a tumorous lesion of the coronary artery and abdominal aortic aneurysm

Immunoglobulin G4 (IgG4)–related disease can occur in various organs, most of which are glandular or ductal tissues. Here, we report a case of multiple IgG4-related vascular lesions. A 63-year-old patient was found to have an abdominal aortic aneurysm and a tumorous lesion around the right coronary artery. The surgically resected aneurysmal wall and a tumorous lesion of the right coronary artery showed similar histologic features including...