Efficacy And Safety Of Antegrade Uretroscopic Lithotripsy Versus Retrograde Ureteroscopic Lithotripsy In The Treatment Of Upper Ureteric Stones Measuring > 10 mm In Maximum Dimension. A Randomized Comparative Study

Inclusion Criteria: * patients with upper urteric stone larger than 10 mm in maximum diameter from the level of pelviureteric junction to upper border of sacroiliac junction and aged ≥18 years Exclusion Criteria: * unresolved urinary tract infection, uncorrected coagulopathy, pregnancy, anatomical abnormalities of the urinary system as horse shoe kidney, pelvic ectopic kidney and ureteric strictures, severe orthopedic malformation hindering prone position or antegrade ureteric access as kyphosis and scoliosis, Pediatric age groups \< 18 years, ureteric Stent in place, concurrent renal stones, bladder cancer, upper urothelial tumors or renal tumors