RESUMO
To report a case of a primary carcinoma arising in a vesical diverticulum. Clinical Presentation and Intervention: A 59-year-old male patient presented with painless macrohematuria. A primary carcinoma arising in a vesical diverticulum was detected with cystoscopy and confirmed with rectal endosonography and computer tomography. and radical cystoprostatovesiculectomy with ileal conduit was performed. Chemotherapy with cisplatin and methotrexate followed. The patient died of an acute cardiac event in the 4th postoperative month.This report illustrates that in a case of a closed opening of a bladder diverticulum, rectal endosonography and computer tomography do provide additional support for making a diagnosis of a hidden tumor in the diverticulum