To compare the outcomes of percutaneous nephrolithotomy (PCNL) across younger and elderly, especially PCNL complications in terms of modified Clavian grading system.
 Cros-sectional comparative study.
Department of Urology, Shifa International Hospital, Islamabad, from 2010 till 2018 December at a tertiary care hospital.
Patients who underwent unilateral PCNL were reviewed group 1 (younger, age 60 years) had 137 patents. Information regarding complication and success rate were recorded by residents in proforma and then processed for statistical computations.
There were total of 731 subjects. The mean age in group 1 was 39.7±11.2 years and that of group B was 65.66±4.55 years. The mean size for calculi in group 1 was 2.83±1.32 cm while in group 2 stone size reached 2.81±1.04 cm. A total of 174 (23.8%) complications and stone free rate of 81.8% (598/731) was recorded in this study. Overall when compared, no notable difference in complications, hospital duration and success rates was observed between the young and elderly age group.
Despite old age, the success rates and complications were not remarkably different from that of the younger subjects for prone PCNL. Key Words: Percutaneous nephrolithotomy, Geriatrics, Renal stone, Complications.