Inclusion Criteria:  Adult patients (both genders) Single non-lower pole renal stone. Stone size: 10-20 mm. Stone density: > 1000 HU.  Exclusion Criteria:  Pregnant women. Morbid obesity. Severe orthopaedic deformities. Co-morbidities precluding general anaesthesia or prone positioning. Uncorrectable coagulation disorders. Active urinary tract infection (UTI). Stone in a calyceal diverticulum. Abnormal renal anatomy. Urinary tract obstruction distal to the stone. Concomitant pathology that needs intervention in the same setting. Advanced hydronephrosis.