Small Bowel Obstruction Caused by Peritoneal Immunoglobulin G4-Related Disease Mimicking Carcinomatosis: Case Report

Immunoglobulin G4-related disease (IgG4-RD) is a very recently defined emerging entity characterized by a diffuse or mass forming inflammatory reaction rich in IgG4-positive plasma cells associated with fibrosclerosis and obliterative phlebitis, and it is found to affect an increasing number of organs or systems (1, 2). We here report a case of diffuse pelvic peritoneal involvement by IgG4-RD in a