PMC7264461_01
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.
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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).
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.
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Abutting of the inferior margin of the coccyx was seen with no spinal extension or bone destruction (Fig. 2).
A trans-sacral incision.
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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.
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.
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The histopathological features were consistent with a tailgut cyst (Fig. 5).