title: Benign causes of acquired ureteropelvic junction obstruction: a uroradiologic spectrum.
abstract: Five different benign causes of ureteropelvic junction obstruction in adults without prior obstructive history are presented: aortic aneurysm, renal cyst, xanthogranulomatous pyelonephritis, eosinophilic ureteritis, and a crossing blood vessel. Although uncommon, these etiologies warrant consideration when an adult patient presents with ureteropelvic junction obstruction without a prior history of obstruction.
mesh_terms: D000328:Adult; D000368:Aged; D001014:Aortic Aneurysm / Q000150:complications; D005260:Female; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000150:complications; D007682:Kidney Pelvis / Q000000981:diagnostic imaging; D008297:Male; D011704:Pyelonephritis / Q000150:complications; D012077:Renal Artery / Q000002:abnormalities; D014057:Tomography, X-Ray Computed; D014513:Ureter / Q000000981:diagnostic imaging; D014515:Ureteral Diseases / Q000150:complications; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging* / Q000209:etiology