Iterative urethroscopic‐guided laser ablation of a benign urethral polyp in a dog

A 7‐year‐old, entire, male Boston terrier was presented for gross pigmenturia of 5 days’ duration. Haematobiochemical analysis revealed moderate normocytic, normochromic anaemia with regenerative features, without other abnormalities. Urinalysis confirmed the presence of haematuria. Ultrasound examination was unremarkable, but retrograde urethrography revealed a urethral mass. Cystourethroscopy revealed a large parietal urethral mass with focal ulcerations. Transurethral endoscopic biopsies were histologically consistent with a benign inflammatory polyp. Medical management with tranexamic acid and ferrous sulphate led to resolution of anaemia, although mild haematuria persisted. Iterative urethroscopic‐guided laser ablation was performed three times at 3‐week intervals, resulting in complete resolution of gross haematuria after the first urethroscopic‐guided laser ablation and macroscopic disappearance of the urethral polyp after iterative urethroscopic‐guided laser ablation. No urinary disorders were observed during follow‐up. This case represents the first report of iterative laser ablation for the safe and successful management of a benign urethral polyp in a dog.