Obstruction, instrumentation, calculi and their effects on the urinary tract.
D006801:Humans; D011704:Pyelonephritis / Q000209:etiology*; D014545:Urinary Calculi / Q000150:complications*; D014566:Urogenital System; D014572:Urology
PYELONEPHRITIS/etiology; URINARY CALCULI/complications; UROGENITAL SYSTEM; UROLOGY