PMC8769425_01
T2-weighted MR images acquired in the sagittal (A and B) and axial (C) planes. A cystic lesion compresses the left dorsolateral intraspinal space of T2-3. MR: magnetic resonance.
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F1
T2-weighted magnetic resonance (MR) images were taken in two planes (Fig. 1).
Intraoperative photograph demonstrating that a cystic lesion is not connected with the ligamentum flavum and joint capsule on the periphery.
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F2
The dura mater itself appeared rather swollen (Fig. 2).
Intraoperative photograph showing that the dura mater itself appeared swollen and septated, along with xanthochromic viscous fluid.
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F3
The incised cyst wall appeared to be the dura mater, and the dura mater apparently extended over the incised cystic basement, instead of the arachnoid mater (Fig. 3).
Photomicrographs hematoxylin and eosin stain showing absence of epithelial lining of the cyst wall. Magnifications, x40 (left) and x100 (right).
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F4
We presumed that a cystic lesion was caused by degeneration of collagen fibers, and the diagnosis of interdural ganglion cyst was made based on the region where the lesion existed (Fig. 4).