
Keywords: دریچه مجرای عقب; KUB; plain abdominal radiograph of the kidneys, ureters and bladder; PCNL; percutaneous nephrolithotomy; PUV; posterior urethral valve; MP; micropercutaneous nephrolithotomy/MicroPerc; URS; ureterorenoscopy; YAG; yttrium-aluminium-garnet; VCUG; voiding cy