Abstract
A male Brazilian Fila dog was referred because of a perineal orifice with urine stream during micturition. To determine the extent of the accessory channel, a contrasted retrograde urethrocystography was performed. A surgical correction was undertaken. Histological study showed the presence of the urethral channel lined by multilayer transitional epithelium. The patient recovered well and there was no evidence of complications one year after surgery.
Highlights
Urethral duplication is a rare congenital anomaly in humans and other animals (Duffey et al, 1998), and it is unique to males (Haleblian et al, 2006)
Incomplete urethral duplications are more common than complete duplications in man (Duffey et al, 1998)
Contrary to the findings by Osborne et al (1975), Tobias and Barbee (1995), and Duffey et al (1998), the dog in this present report did not have complications associated with urethral duplication, and the owner opted for surgical treatment to correct the defect
Summary
Urethral duplication is a rare congenital anomaly in humans and other animals (Duffey et al, 1998), and it is unique to males (Haleblian et al, 2006). Perineal urethral duplication is considered extremely rare in humans In these cases, an accessory urethra originates from the primary urethra, and it possesses a perineal opening (Wagner et al, 1996). Tobias and Barbee (1995) described a urethral duplication in a miniature poodle, which presented other associated anomalies such as urethrorectal fistula, urethroperineal fistula, and caudal lumbar vertebral fusion These authors continued to report clinical signs in this dog as urine scald, cystitis, hematuria, urolithiasis, and diarrhea; they believed that those signs were related to other urethral abnormalities, and not with urethral duplication.
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