Blacklock, Kelly

Boag, Alisdair

Ferreira, Marisa

Liuti, Tiziana

Pratschke, KM

Salavati, Silke

Saunders, Jimmy

Schwarz, Tobias

Woods, Glynn

English

IntroductionStenosis of the intramural portion of the ureter (StIMU) has rarely been reported in dogs1,2 but has been observed in our excretory urinary computed tomography (EUCT) caseload. Purpose of this study was to investigate the prevalence and EUCT features of StIMU in dogs.MethodsSingle institutional archives were searched for dogs with EUCT-identified, surgically confirmed StIMU. The urogenital tract was assessed for size, shape, mineralisation, excretion and peristalsis in EUCT. ResultsTwo-hundred-ninety-three EUCT studies were identified. Three dogs met the inclusion criteria, a 1-year-old male Miniature-Schnauzer-Poodle cross with urinary incontinence (case 1), a 3-month-old male Newfoundland dog with haematuria (case 2) and a 4-year-old male Newfoundland dog with pollakiuria (case 3). EUCT examination revealed renal pyelectasia, hydroureter and an abnormal intramural portion of the ureter. Intramural ureteral abnormalities included lack of peristaltic distension, ectopia and aberrant lateral course. Surgical exploration revealed bilateral ureteral stenosis and unilateral ectopia (case 1), bilateral ureteral stenosis and ectopia (case 2) and unilateral stenosis without ectopia (case 3).DiscussionStenosis of the intramural portion of the ureter is rarely seen, with young male dogs overrepresented, and should be included in the differential diagnosis of hydroureter.1,2,3 This may represent a congenital malformation or a fibrotic inflammatory reaction but is not necessarily associated with ureteral ectopia. Concurrent urinary tract infection needs to be considered as potential cause or result of StIMU. EUCT may be of value for treatment planning. Further investigation for breed predisposition in Newfoundland dogs is warranted

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     Edinburgh Research Explorer                                      Computed tomographic features of canine intramural ureteralstenosis in three dogs.Citation for published version:Schwarz, T, Ferreira, M, Salavati, S, Liuti, T, Woods, G, Boag, A, Pratschke, KM, Saunders, J & Blacklock,K 2023, 'Computed tomographic features of canine intramural ureteral stenosis in three dogs.', InternationalVeterinary Radiology Association / European Veterinary Diagnostic Imaging Joint Scientific Conference,Dublin, Ireland, 18/06/23 - 23/06/23 pp. 73-74.Link:Link to publication record in Edinburgh Research ExplorerDocument Version:Peer reviewed versionGeneral rightsCopyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s)and / or other copyright owners and it is a condition of accessing these publications that users recognise andabide by the legal requirements associated with these rights.Take down policyThe University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorercontent complies with UK legislation. If you believe that the public display of this file breaches copyright pleasecontact openaccess@ed.ac.uk providing details, and we will remove access to the work immediately andinvestigate your claim.Download date: 30. Jul. 2023Abstract Computed tomographic features of canine intramural ureteral stenosis in three dogs. Introduction Stenosis of the intramural portion of the ureter (StIMU) has rarely been reported in dogs1,2 but has been observed in our excretory urinary computed tomography (EUCT) caseload. Purpose of this study was to investigate the prevalence and EUCT features of StIMU in dogs. Methods Single institutional archives were searched for dogs with EUCT-identified, surgically confirmed StIMU. The urogenital tract was assessed for size, shape, mineralisation, excretion and peristalsis in EUCT.  Results Two-hundred-ninety-three EUCT studies were identified.  Three dogs met the inclusion criteria, a 1-year-old male Miniature-Schnauzer-Poodle cross with urinary incontinence (case 1), a 3-month-old male Newfoundland dog with haematuria (case 2) and a 4-year-old male Newfoundland dog with pollakiuria (case 3). EUCT examination revealed renal pyelectasia, hydroureter and an abnormal intramural portion of the ureter. Intramural ureteral abnormalities included lack of peristaltic distension, ectopia and aberrant lateral course. Surgical exploration revealed bilateral ureteral stenosis and unilateral ectopia (case 1), bilateral ureteral stenosis and ectopia (case 2) and unilateral stenosis without ectopia (case 3). Discussion Stenosis of the intramural portion of the ureter is rarely seen, with young male dogs overrepresented, and should be included in the differential diagnosis of hydroureter.1,2,3 This may represent a congenital malformation or a fibrotic inflammatory reaction but is not necessarily associated with ureteral ectopia. Concurrent urinary tract infection needs to be considered as potential cause or result of StIMU. EUCT may be of value for treatment planning. Further investigation for breed predisposition in Newfoundland dogs is warranted.  References 1. Meler E, Berent AC, Weisse C, Dunn M. Treatment of congenital ureteral orifice stenosis by endoscopic laser ablation in dogs: 16 cases (2010-2014). J Am Vet Med Assoc 2018;253:452-462. 2. Pullium JK, Dillehay DL, Webb S, Pinter MJ. Congenital bilateral ureteral stenosis and hydronephrosis in a neonatal puppy. Contemp Top Lab Anim Sci 2000;39:34-36. 3. Lam NK, Berent AC, Weisse CW, Bryan C, Mackin AJ, Bagley DH. Endoscopic placement of ureteral stents for treatment of congenital bilateral ureteral stenosis in a dog. J Am Vet Med Assoc 2012;140:983-990.  

Computed tomographic features of canine intramural ureteral stenosis in three dogs.

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Computed tomographic features of canine intramural ureteral stenosis in three dogs.

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