case_images: PMC7264461_01
case_images: A: CT scan of the abdomen revealed a unilocular non-enhancing low-attenuation mass at the retrorectum measuring 5.4 x 4.6 cm. B: Coronal view of the same image.
case_images: gr1.jpg
case_images: PMC7264461_01_gr1.jpg
case_images: fig0005
case_images: Computed tomography (CT) of the abdomen revealed a unilocular non-enhancing low-attenuation mass at the retrorectum measuring 5.4 x 4.6 cm (Fig. 1).
case_images: A: MRI of abdomen confirmed a well-defined homogeneous at the lower pelvis, retrorectal in location, approaching the level of the anal canal. Anterior displacement of the rectum was seen with no signs of rectal wall signal alteration to suggest infiltration. B: Sagittal view of the same image.
case_images: gr2.jpg
case_images: PMC7264461_01_gr2.jpg
case_images: fig0010
case_images: Abutting of the inferior margin of the coccyx was seen with no spinal extension or bone destruction (Fig. 2).
case_images: A trans-sacral incision.
case_images: gr3.jpg
case_images: PMC7264461_01_gr3.jpg
case_images: fig0015
case_images: A trans-sacral incision was made (Fig. 3), and the retrorectal cyst, measuring 3 x 5 cm, located posterior to the rectum (Fig. 4) was completely excised along with a part of her coccyx bone.
case_images: Histological examination revealed a multilocular cystic structure lined by pseudostratified ciliated and transitional epithelium with foci of mucinous differentiation. No teratomatous components were identified. The histopathological features were consistent with tailgut cyst.
case_images: gr5.jpg
case_images: PMC7264461_01_gr5.jpg
case_images: fig0025
case_images: The histopathological features were consistent with a tailgut cyst (Fig. 5).