title: Subtle obstructive uropathy resulting from encasement of the ureters by tumor.
abstract: The diagnosis of obstructive uropathy may be difficult in the occasional case in which there is little or no dilatation of the collecting system. A case is presented in which anuric renal failure resulted from encasement of the ureters by tumor. The excretory urogram revealed a delayed pyelogram and a dense nephrogram with minimal dilatation of the collecting systems. The combination of a dense nephrogram and delayed pyelogram should raise the possibility of obstruction, regardless of the appearance of the collecting systems.
mesh_terms: D001002:Anuria / Q000209:etiology; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000150:complications*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000150:complications*; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology*