title: Spontaneous pyelotumoral backflow: a sign of necrotic neoplasm.
abstract: A case is presented in which an irregular pattern of extravasation of contrast medium was observed during excretory urography. This proved to be extravasation into the necrotic center of a neoplasm. The differential diagnosis of extravasation during excretory urography is discussed.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D000368:Aged; D003937:Diagnosis, Differential; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D007890:Leiomyosarcoma / Q000175:diagnosis / Q000000981:diagnostic imaging; D010386:Pelvic Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D011859:Radiography