title: Pelvocalyceal wall opacification--a new radiological sign.
abstract: A new radiological sign is described consisting of opacification of the pelvocalyceal wall during the early stage of an excretory urogram. This sign is associated with acute infection in an obstructed urinary tract system.
mesh_terms: D006801:Humans; D007682:Kidney Pelvis / Q000000981:diagnostic imaging*; D014552:Urinary Tract Infections / Q000150:complications; D014567:Urography / Q000379:methods