Unilateral extramural ureteral ectopia in a cat: Ultrasonographic and computed tomography findings

Abstract

A 6‐months‐old male intact Maine Coon cat presented for investigation of urinary incontinence and a palpable mass in the right cranial abdomen. Abdominal ultrasonography (US) revealed marked right hydronephrosis and hydroureter and raised a suspicion of ureteral ectopia, but the exact location of the ureterovesical junction was not visualised. Abdominal CT was performed and provided excellent information about opening of the ureter and confirmed the diagnosis of right extramural ureteral ectopia. The patient underwent ureteronephrectomy and recovered without complications. No urinary incontinence was detected after surgery. The patient continues to do well and remains free from clinical signs up to date. This is the first case report describing the use of CT and US in diagnosis of a rare anomaly of ureteral ectopia in a cat. It also highlights the important role of diagnostic imaging modalities in investigating and treatment planning of ectopic ureters in feline patients.