Retroperitoneal gas study in the assessment of neoplastic and constricting lesions involving the ureter.
D002277:Carcinoma / Q000000981:diagnostic imaging*; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging*; D006801:Humans; D008722:Methods; D012185:Retroperitoneal Fibrosis / Q000000981:diagnostic imaging*; D012188:Retropneumoperitoneum; D014516:Ureteral Neoplasms / Q000000981:diagnostic imaging*; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging*; D014567:Urography