Introduction

Ureteral obstruction in small animals is usually caused by urolithiasis, neoplasia and blood clots and less common causes include congenital stenosis. Ureteropelvic junction stenosis has been rarely documented in dogs.

Objectives

The present report case aimed to describe the clinical findings, treatment and outcomes of a congenital bilateral ureteropelvic junction stenosis in a puppy.

Methods

A 2-month-old Shih-Tzu male dog was presented to the Veterinary Teaching Hospital, School of Veterinary Medicine and Animal Science, University Estadual Paulista, Botucatu, São Paulo, Brazil, for evaluation of progressive abdomen distension of one month’s duration. The owner reported that the dog’s appetite was normal also the water drinking.

Results

No change was observed in relation to urine. Complete blood count exams revealed mild anemia and lymphocytosis. Serum biochemical and urinalysis were within normal values. Abdominal X-rays and ultrasound findings were compatible with bilateral hydronephrosis. Excretory urography was performed and showed dilation of the renal pelvis and the medial region of the left ureter, bilateral stenosis of the ureteropelvic junction and presence of high density material in renal cortex. These findings were consistent with ureteropelvic junction stenosis and the dog undergoing to partial ureterectomy and ureteropelvic anastomoses of both kidneys in interval of four months. Eighteen months after surgery the dogs remained with mild hydronephrosis of the left kidneys and revealed no further abnormalities.

Conclusions

One previous report described ureteropelvic junction stenosis in dog. The present case reported a successfully surgical treatment of a congenital ureteropelvic junction stenosis in a 2-month-old Shih-Tzu male dog.