| Histological types | Number | Percentage% |
| Transitional cell carcinoma | 33 | 82.5 |
| Squamous cell carcinoma | 3 | 7.5 |
| Adenocarcinoma | 2 | 5 |
| Sarcomatoid carcinoma | 1 | 2.5 |
| Indifferenciated carcinoma | 1 | 2.5 |