“…The relative contraindications are nonfunctioning kidneys due to renal tuberculosis, pyonephrosis, infected pyelonephritic kidneys due to stone disease, posttraumatic atrophy, post-ESWL therapy for renal stones, cases with severe perinephritis, and patients with previous retroperitoneal surgery [17][18][19][20]. However, in my experience, a substantial number of these cases can be dealt with using modified techniques as described later.…”