History | Number | Percentage (%) |
Urinary tract infection | 10 | 33.3 |
Bilharzia | 7 | 23.3 |
Congenital malformation | 4 | 13.3 |
Trauma | 2 | 6.7 |
Bladder lithiasis | 2 | 6.7 |
None | 5 | 16.7 |
Total | 30 | 100 |