title: Structural changes associated with obstruction of the urinary tract: A comparison between upper and lower systems.
mesh_terms: D006801:Humans; D014513:Ureter / Q000473:pathology; D014517:Ureteral Obstruction / Q000473:pathology*; D001743:Urinary Bladder / Q000473:pathology; D001748:Urinary Bladder Neck Obstruction / Q000473:pathology*