Inflammatory Pseudotumor of the Urinary Bladder Mimicking Bladder Cancer Secondary to Diverticulitis of the Sigmoid Colon

Fifty-seven years old man patient was admitted to our clinic with suprapubic tenderness and dysuria. Urinary ultrasonography showed the lesion that extending to the bladder lumen from the left wall. Urinary cytology was negative. Cystoscopy detected a tumor with smooth surface at the same localization. Computerized tomography (CT) showed 40x14 mm size solid contrast enhancing mass which is containing air density on the bladder left lateral wall (Figure 1). Colonoscopy demonstrated multiple diverticula orifices with inflamatory change on the mucosa. Exploration was planned to confirm primer disease. We observed at the level of the inferior segment of the sigmoid colon strongly adherent to urinary bladder. After we subsequently performed partial cystectomy, partial colectomy and colostomy (Figure 2). Pathological examination revealed no malignancy. It’s reported as chronic inflammation in the suburothelial connective tissue and localised peritonitis due to perforation of diverticulum of sigmoid colon. Follow-up with CT scan 6 months postoperatively was normal and showed no evidence of recurrence.