PMC10246340_01
Results of magnetic resonance imaging (MRI). (a) T2-weighted sagittal image from 12 years before this presentation shows cystic dilatation of the conus medullaris. (b-1) T1-weighted image. (b-2) T1-weighted image with gadolinium enhancement. (b-3) T2-weighted image. (c) Postoperative T2-weighted images obtained 3 years after surgical treatment reveal regression of the dilatation without evidence of relapse (white bold arrow).
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F1
T1-weighted imaging, confirming cystic dilation of the VT as so-called enlarging VT. The size of this cyst appeared to have increased over the 12 years [Figures 1a and b]. Follow-up MRI after 3 years revealed complete regression of the dilation with no evidence of relapse [Figures 1c and 2].
Cystic dilation of the ventriculus terminalis from an intraoperative view. (a and b) On opening the dura, the expanded conus began herniating outward under pressure, which was relieved by fenestration. (c) Cystsubarachnoid shunt was created using a syringo-subarachnoid shunt tube (diameter: 1.2 mm, length: 40 mm). Black asterisk: Cyst wall, black star: Cauda equina, black arrow: Syringo-subarachnoid shunt tube.
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F2
Follow-up MRI after 3 years revealed complete regression of the dilation with no evidence of relapse [Figures 1c and 2].
PMC10246340_02
Preoperative sagittal and axial spinal magnetic resonance imaging demonstrating a cystic lesion near the conus medullaris. (a) Sagittal T1-weighted image with non-contrast sequence. (b) Sagittal T2-weighted image. (c) Axial T2-weighted image. (d) Postoperative sagittal T2-weighted image 2 years after surgery reveals complete regression of the dilation (white bold arrow).
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F3
MRI on admission demonstrated a cystic lesion in the conus medullaris spanning from the 12th thoracic to first lumbar level [Figures 3a-c]. Postoperative MRI after 2 years revealed complete regression of the dilation with no evidence of relapse [Figure 3d].
PMC10246340_03
Sagittal and axial magnetic resonance imaging on admission demonstrating a cystic lesion near the conus medullaris. (a) Sagittal T1-weighted image with non-contrast sequence. (b) Sagittal T2-weighted image. (c) Axial T2-weighted image. (d) Postoperative sagittal T2-weighted image 1 year after surgery shows complete regression of the dilation (white bold arrow).
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F4
MRI on admission showed findings similar to those in Cases 1 and 2 [Figure 4]. MRI 1 year after surgery did not show any growth of the cyst lesion [Figure 4].