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  • Title: Chronic partial obstructive urolithiasis causing hydronephrosis and chronic renal failure in a steer.
    Author: Aldridge BM, Garry FB.
    Journal: Cornell Vet; 1992 Jul; 82(3):311-7. PubMed ID: 1643882.
    Abstract:
    A 13-month-old Angus steer was examined with a 6-week history of lethargy, malaise and dribbling urine. Laboratory exam revealed crystalluria and poor renal function. Ultrasound revealed hydronephrosis and hydroureter. Euthanasia was chosen because of a poor prognosis for economic recovery. Necropsy demonstrated numerous calculi causing partial urethral obstruction approximately 25 cm from the end of the penis. Secondary renal changes were confirmed. Urolithiasis occurs commonly in ruminants. Secondary obstruction is usually complete with severe consequences. This is the first report of chronic partial obstructive urolithiasis resulting in endstage renal disease.
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