case_images: PMC6421014_01
case_images: PMC6421014_02
case_images: (a) and (b) Two functional anal openings. This photograph depicts the locations of the two anal openings, left ( ) and right (*). Both openings were situated off-center from midline by a few millimeters. The left anal opening is positioned more off-center, anatomically narrower, and angled more laterally than the larger right anal opening. (b) Vulva and vestibule. This photograph depicts the complete septum (*) and the small clitoris with smaller than usual openings into each vaginal canal. Dorsal is toward the bottom of the image.
case_images: CRIVEM2019-3696978.001.jpg
case_images: PMC6421014_02_CRIVEM2019-3696978.001.jpg
case_images: fig1
case_images: On physical examination, the left anal orifice was situated 3-4 mm off midline, was smaller in diameter, and had a slit-like appearance compared to the right anal opening, which was 1-2 mm to the right of midline (Figure 1(a)). Urogenital physical evaluation revealed a complete ventral to dorsal soft tissue septum bisecting the vulva, which can be seen in Figure 1(b).
case_images: PMC6421014_03
case_images: Dorsal plane CT image of the rectum with positive contrast medium infused through two catheters in each anal opening left (**) and right (*). The contrast is distinctly separate caudally, proceeding cranially in the rectum, and then joins approximately 4.5 cm cranially ( ).
case_images: CRIVEM2019-3696978.002.jpg
case_images: PMC6421014_03_CRIVEM2019-3696978.002.jpg
case_images: fig2
case_images: The contrast then joined again cranially at the level of the second caudal vertebra (Figure 2).
case_images: Transverse CT image at the level of the ischium with nonionic, iodinated contrast medium demonstrating a septate urinary bladder (*) and two distinct urethras (arrows).
case_images: CRIVEM2019-3696978.003.jpg
case_images: PMC6421014_03_CRIVEM2019-3696978.003.jpg
case_images: fig3
case_images: The left and right portions of the urinary bladder were mildly to moderately filled with fluid and contrast medium (Figure 3).
case_images: Urogenital system. The dog had normal kidneys and ureters. One ovary and uterine horn on each side were visualized (*). The urinary bladder complete septum ( ) was seen. A single urethra (arrowheads) exiting on each side of the urinary bladder and then joining each cervix before exiting through separate vaginal canals (arrows).
case_images: CRIVEM2019-3696978.004.jpg
case_images: PMC6421014_03_CRIVEM2019-3696978.004.jpg
case_images: fig4
case_images: The urethras each extended approximately 4.5 cm caudally and then entered separate duplicated vaginas, each with a separate vaginal canal and opening to the outside of the body (Figure 4).
case_images: Colon and rectum. (a) Serosal surface and external anal orifices. (b) Mucosal surface and external anal orifices. The mucosal surface of the colon was completely duplicated with a septum (*) which extended 4.5 cm orally before joining to one colon.
case_images: CRIVEM2019-3696978.005.jpg
case_images: PMC6421014_03_CRIVEM2019-3696978.005.jpg
case_images: fig5
case_images: Approximately 2 cm from the rectum, there was a similar bifurcation that diverged the colon into two rectal portions and separate anal openings (Figure 5).