PMC9732570_01
(A) Perineal region in a 2-year-old male dog with a urethral duplication. Note the catheterized opening of the ectopic urethra in annus. (B) A retrograde cystogram was preformed to identify the location of duplication of the urethra and its length. Note its beginning (white arrow) and ending (black arrow).
fvets-09-1013270-g0001.jpg
PMC9732570_01_fvets-09-1013270-g0001.jpg
F1
Clinical examination and visualization of the opening at the level of the anus ventrally revealed urine leakage from the anus (Figure 1A). The accessory urethral length, previously determine with CT and later, intraoperatively, using a sterile measuring tape, was ~2.5 cm (Supplementary Figure 1).
CT sagittal image of the urethral duplication after retrograde injection of iodinated contrast medium in both urethral openings. Note the ectopic urethra (green arrows) and the orthotopic urethra (green arrowhead).
fvets-09-1013270-g0002.jpg
PMC9732570_01_fvets-09-1013270-g0002.jpg
F2
Computed tomography (CT) revealed a perineal fistula connected to the urethra, compatible with congenital perineal urethral duplication (Figure 2).
(A) Contrast cystogram performed after the first intervention. (B) Contrast cystogram performed with manual compression of the bladder. Note the pre-stenotic bulge of the pelvic urethra (black arrows).
fvets-09-1013270-g0003.jpg
PMC9732570_01_fvets-09-1013270-g0003.jpg
F3
Retrograde urethrocystography was performed once again, which revealed an apparently normal-sized urethra (initially identified) and no signs of contrast leakage (Figure 3A). During the procedure, a pre-stenotic bulging of the pelvic urethra was identified, which was compatible with dilation of the ectopic urethra remnant leading to a valve effect and dynamic obstruction of the orthotopic urethra (Figure 3B).
(A) Intraoperative image of the opening of the ectopic urethra (black arrow) after urethrotomy. Note the urinary catheter ascending from the pelvic urethra. (B) Note the Metzenbaum scissors entering the remnant of the ectopic urethra.
fvets-09-1013270-g0004.jpg
PMC9732570_01_fvets-09-1013270-g0004.jpg
F4
The ectopic urethral remnant was identified at the dorsal wall of the orthotopic urethra (Figure 4).