Recurrent Sigmoid Diverticulitis After Intravesical Bacillus Calmette-Guérin (BCG) Immunotherapy for Bladder Cancer

Bacillus Calmette-Guerin (BCG), a live attenuated strain of Mycobacterium bovis, is a popular adjunctive therapy for superficial bladder cancer as it triggers local immune response. Localized cystitis is a common complication, but systemic infections or sepsis is rare. Diverticulitis has never been reported as a complication of intravesical BCG use. We report two episodes of sigmoid diverticulitis in a patient with urinary bladder papillary...