PMC8053451_01
MRI of the thoracic spine. Left - T2-weighted MR images revealed a syrinx with edema. Center, right - T1-weighted Gd-enhanced image coronal and axial image revealing an extramedullary intradural isodense mass (arrow) at the Th2-3 level. Center, coronal view. Right, axial view.
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F1
T2-T3 level [Figure 1]. The lesion appeared to be on the surface of the cord and occupied the left posterolateral canal; the syrinxes were located both above and below the lesion.
Left - Intraoperative photograph. A triangle small orange tumor between the thoracic roots. The thin wall of cyst is also seen at caudal side. Right - feeder (left side red) and drainer (right side green) identified by intraoperative indocyanine green.
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F2
On opening the dura and arachnoid, a triangular, small, orange mass could be seen located between the thoracic roots [Figure 2].