Objective: Hyaline ring granulomas, or pulse granulomas, are rare inflammatory responses to vegetable matter, characterised by aggregates of hyaline rings and other inflammatory components around vegetable matter. The vast majority occur in the oral cavity and only a few specific extra-oral cases have been reported. We present a case of pulse granulomas in the wall of the urinary bladder, occurring in a 50 year-old gentleman with a concurrent history of diverticulitis and colo-vesical fistula. Pulse granulomas were recently described in the bladder in association with interstitial cystitis, in mesocolonic fat and mesocolonic lymph nodes in association with inflammatory bowel disease and in enterocutaneous and recto-salpingeal fistulas in association with diverticulitis. To our knowledge this is the first case reporting the direct association of the occurrence of bladder pulse granulomas in relation to diverticulitis. Method: The tissue sections were fixed with 10 % buffered formalin and stained with H&E. Results: Histopathological examination revealed several hyaline ring granulomas within the outer muscle layer and serosa of the urinary bladder, together with hyaline ring granulomata within the outer wall of the sigmoid colon associated with diverticula. Conclusion: It is important to differentiate pulse granulomas from parasites, hyaline ring vasculopathy, granulomatous inflammatory disorders and even malignancy. Objective: Micropapillary carcinoma (MPC) is associated with poor prognosis, and may lead to immediate cystectomy irrespective of stage. We study MPC, with "classical" histologic features, to "stage-matched urothelial carcinoma (UCa), not otherwise specified (NOS)", and other UCa with divergent differentiation to compare outcome.