Postoperative Outcomes of PCNL vs RIRS in Obese Patients With Pelvic 1.5:3 cm Renal Stones

Inclusion Criteria: * Obese adult patients with body mass index ≥30 * aged ≥ 18 years * unilateral pelvic renal stone from 1.5 to 3 cm in largest diameter. Exclusion criteria: * A single kidney * renal impairment (serum creatinine \> 1.4 mg/dl) * patients with uncontrolled co-morbidities (hypertension, diabetes mellitus, cardiac disease, chest disease) * active Urinary tract infection * ureteric or bladder stones * anatomic renal abnormalities (congenital renal malformations such as horseshoe kidney, polycystic kidney disease, etc.) * people with severe skeletal deformity * pregnant women * history of ureteric strictures * uncorrectable bleeding disorder.