Abstract
Summary A seven-year-old stallion with diversion of urinary pass to the thigh due to a urethral fistula caused by gunshot perineal injury was presented to the Urmia University, Veterinary Teaching Hospital. No signs of urinary obstruction or renal failure were observed. Because of inaccessible location of the injured urethra, through a perineal urethrotomy incision, a urinary catheter was effectively advanced to repel the obstruction into the bladder. Retrograde urethral catheterization was adopted for 5 days to assist mucosal healing. Healing was uneventful and no complications were observed during one month postoperative. Key words: Fistula, Urethra, Gunshot, Stallion Introduction The urethra, a muscular tube lined by mucosa, serves as the normal conduit for urine flow to the exterior of the body after birth. The male urethra connects the bladder to the glans penis and consists of pelvic and extrapelvic segments (Sisson and Grossman, 1975). Disorders of the equine penis and urethra that require surgery are principally limited to conditions involving urolithiasis, soft tissue obstructions, contusions, and lacerations (Trotter
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