Urological history | Number | Percentage (%) |
Lombotomy | 6 | 20.0 |
Urinary bilharzia | 2 | 6.7 |
Percutaneous nephrolithotomy | 2 | 6.7 |
Extracorporeal lithotripsy | 1 | 3.3 |
Semi-rigid ureteroscopy | 1 | 3.3 |
Without urological history | 18 | 60.0 |
Total | 30 | 100 |