Case Description: A 17-week-old spayed female Sphinx was evaluated after a 3-day history of inappetence, lethargy, and vomiting. Three weeks prior, the kitten had undergone routine elective ovariohysterectomy.
Clinical Findings: Abdominal ultrasonography revealed moderate hydronephrosis of the left kidney, and the left ureter was tortuous and dilated from the kidney to the level of the midureter, where it abruptly tapered.