PMC3843904_01
Axial CT image of the lower pelvis. A well-circumscribed solid tumor is seen in the presacral region, with no signs of infiltration, in contact with the posterior wall of the rectum (arrow).
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F1
Abdominal computed tomography (CT) confirmed the presence of a well-circumscribed solid tumor in the presacral region, measuring 10 x 8.5 cm in size and presenting smooth edges and no calcifications (fig. 1).
Sagittal T1-weighted MRI image. A presacral tumor with low signal intensity is shown (red arrow). A fat plane can be seen between the tumor and the rectum, indicating that infiltration is not present (blue arrow).
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F2
Pelvic magnetic resonance imaging (MRI) confirmed the extension of the lesion from the S2 level to the coccyx (fig. 2).
Axial T2-weighted MRI image. An inhomogeneous compartmentalized solid tumor with cystic components is illustrated.
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F3
In addition, we were able to demonstrate by T2-weighted images that it was a compartmentalized solid tumor with cystic components (fig. 3).
Histopathologic findings. The tumor contains small clusters of mature ganglion cells surrounded by a Schwann cell-rich stroma (HE x400).
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F4
The neoplasm contained mature ganglion cells and Schwann cells together with collagen (fig. 4).