Crossed renal ectopia is a rare congenital malformation. Only 36 cases of crossed renal ectopia with calculus have been recorded in literature. even a few cases of urolithiasis in them have been surgically managed. The majority of cases in literature have been published as single case reports. https://www.roneverhart.com/Ludwig-P2230B-Imperial-Tension-Lug-for-Snare-Drums-p9792/