title: When do we need contrast-enhanced CT in patients with vague urinary system findings on unenhanced CT?
abstract: Determination of renal neoplasms, hematoma, infarct, urinoma, cysts, and pyelonephritis may require contrast material administration following unenhanced CT in patients with flank pain. In this pictorial review, we aimed to clarify when contrast material administration is needed following vague urinary system findings on unenhanced CT.
authors.affiliation: Department of Radiology, Hacettepe University School of Medicine, Ankara, Turkey.
authors.forename: Erhan
authors.initials: E
authors.lastname: Akpinar
authors.forename: Baris
authors.initials: B
authors.lastname: Turkbey
authors.forename: Gonca
authors.initials: G
authors.lastname: Eldem
authors.forename: Musturay
authors.initials: M
authors.lastname: Karcaaltincaba
authors.forename: Okan
authors.initials: O
authors.lastname: Akhan
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014570:Urologic Diseases / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media