Genitourinary involvement of immunoglobulin G4–related disease.

The article describes the case of a 54-year-old Hispanic man with bladder cancer and concomitant IgG4-mediated GU disease causing intermittent gross haematuria. Highlights include diffusely thickened bladder wall shown by preoperative imaging, urine cytology collected from the neobladder, and repeat pathological evaluation of the patient's cystectomy specimen.