Transitional cell carcinoma within a bladder diverticulum: CT findings and pathologic correlation

A case of transitional cell carcinoma within a bladder diverticulum is presented. A 71 -year-old man with a previous history of prostate carcinoma presented with hematuria and a burning sensation during urination. CT IVP detected a small polypoid mass within a bladder diverticulum, suspicious for a malignancy. A biopsy was performed during cystoscopy and pathology revealed a high grade papillary urothelial carcinoma with no muscularis propria identified. He underwent radical cystectomy and was followed up for recurrence. The clinicopathologic characteristics of diverticular neoplasms and the importance of CT in the diagnosis of overlooked lesions and staging are reviewed.