An 8-year-old dog weighing 45 kg presented with symmetric alopecia, diarrhoea and undescended testes with no associated urinary symptoms. Abdominal ultrasonography and computed tomographic excretory urography revealed extensive dilation and reduced peristalsis of both ureters, except for the distal parts, which showed normal insertion into the urinary bladder, and normal calibre without peristalsis. No abnormalities of the urinary bladder or urethra that may have caused obstruction were identified. A diagnosis of primary megaureter was made. This is the first known reported case of primary megaureter in a dog. To our knowledge, this is first known case report in the veterinary literature that describes the ultrasonographic features of primary megaureter.
Alaskan malamute dog; canine; dilated ureter; renogram; sustentacular cell tumour
Barrett Julia F., Keat Nicholas (2004): Artifacts in CT: Recognition and Avoidance. RadioGraphics, 24, 1679-1691 https://doi.org/10.1148/rg.246045065
Berent Allyson C. (2011): Ureteral obstructions in dogs and cats: a review of traditional and new interventional diagnostic and therapeutic options. Journal of Veterinary Emergency and Critical Care, 21, 86-103 https://doi.org/10.1111/j.1476-4431.2011.00628.x
Berrocal Teresa, Gayá Francisco, Arjonilla Antonia, Lonergan Gael J. (2001): Vesicoureteral Reflux: Diagnosis and Grading with Echo-enhanced Cystosonography versus Voiding Cystourethrography. Radiology, 221, 359-365 https://doi.org/10.1148/radiol.2212001807
Berrocal Teresa, López-Pereira Pedro, Arjonilla Antonia, Gutiérrez Julia (2002): Anomalies of the Distal Ureter, Bladder, and Urethra in Children: Embryologic, Radiologic, and Pathologic Features. RadioGraphics, 22, 1139-1164 https://doi.org/10.1148/radiographics.22.5.g02se101139
Cohan RH, Caoili EM (2007): CT urography techniques. In: Silverman SG, Cohan RH (eds): CT Urography: an Atlas. 1st edn. Lippincott Williams and Wilkins, Philadelphia. 15–17.
Gimpel Charlotte, Masioniene Liuda, Djakovic Nenad, Schenk Jens-Peter, Haberkorn Uwe, Tönshoff Burkhard, Schaefer Franz (2010): Complications and long-term outcome of primary obstructive megaureter in childhood. Pediatric Nephrology, 25, 1679-1686 https://doi.org/10.1007/s00467-010-1523-0
Gross GW, Lebowitz RL (1981): Infection does not cause reflux. American Journal of Roentgenology, 137, 929-932 https://doi.org/10.2214/ajr.137.5.929
Kass EJ (1992): Megaureter. In: Kelalis PP, King LR, Belman AB (eds): Clinical Pediatric Urology. 3rd edn. Saunders, Philadelphia. 781–821.
Khoury A, Bagli DJ (2007): Reflux and megaureter. In: Wein AJ, Kavoussi LR, Novick AC, Partin AW, Peters CA (eds): Campbell-Walsh Urology. 9th edn. Elsevier Inc, Philadelphia. 3467–3468.
Meyer J. S., Lebowitz R. L. (1992): Primary megaureter in infants and children: A review. Urologic Radiology, 14, 296-305 https://doi.org/10.1007/BF02926946
Shokeir AA, Nijman RJM (2000): Primary megaureter: Current trends in diagnosis and treatment. BJU International 86, 861–868.
Smith ED, Cussen LJ, Glenn J (1977): Report of working party to establish an international nomenclature for the large ureter. Birth Defects Original Articles Series 13, 3–8.
Steffey Michele A., Brockman Daniel J. (2004): Congenital ectopic ureters in a continent male dog and cat. Journal of the American Veterinary Medical Association, 224, 1607- https://doi.org/10.2460/javma.2004.224.1607
Young Christopher J., Attele Anoja, Toledano Alicia, Núñez Ramon, Moss Jonathan (1994): Volatile Anesthetics Decrease Peristalsis in the Guinea Pig Ureter. Anesthesiology, 81, 452-458 https://doi.org/10.1097/00000542-199408000-00024