Classification of Tumors of Urinary Bladder

Tumors of urinary bladder may be classified as follows:

1. Urothelial (Transitional) Tumors

Exophytic papilloma

Inverted papilloma

Papillary urothelial neoplasms of low malignant potential

Low and high grade papillary urothelial cancers

Carcinoma in situ

2. Mixed carcinoma

3. Adenocarcinoma

4. Small cell carcinoma

5. Sarcoma

Image: urothelial carcinoma, courtesy of Nephron