Peri-ureteric mass an unusual case of immunoglobin G4-related disease (IgG4-RD)

Urol Case Rep. 2021 Mar 31:38:101666. doi: 10.1016/j.eucr.2021.101666. eCollection 2021 Sep.


Immunoglobulin G4-related disease (IgG4-RD) of the ureter is a rarely reported disease, often mimicking urothelial carcinoma. This paper describes a case of an otherwise healthy patient with a lesion involving the ureter revealed on Computed tomography (CT), avid on fludeoxyglucose positron emission tomography (FDG PET), that prior to surgery was suspicious for urothelial carcinoma, until intra-op frozen section revealed otherwise. Diagnosis of ureteral IgG4-RD should be considered as a differential diagnosis, with serum IgG4 levels obtained.

Keywords: IgG4; Peri-ureteric mass; Ureter.

Publication types

  • Case Reports