title: Peripelvic extravasation in chronic ureteral obstruction by reticulum-cell sarcoma.
mesh_terms: D002908:Chronic Disease; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging / Q000209:etiology*; D007674:Kidney Diseases / Q000209:etiology*; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012422:Rupture, Spontaneous; D014516:Ureteral Neoplasms / Q000000981:diagnostic imaging*; D014517:Ureteral Obstruction; D014567:Urography