Inclusion CIM-10 : Pyelonephritis (chronic) associated with anomaly of pelviureteric junction; Pyelonephritis (chronic) associated with obstruction of ureter; Pyelonephritis (chronic) associated with anomaly of pyeloureteric junction; Pyelonephritis (chronic) associated with crossing of vessel; Pyelonephritis (chronic) associated with stricture of pelviureteric junction; Pyelonephritis (chronic) associated with kinking of ureter; Pyelonephritis (chronic) associated with stricture of ureter;