case_images: PMC11090601_01
case_images: (a) Preoperative T2-weighted parasagittal thoracic and lumbar magnetic resonance imaging (MRI). (b) Preoperative T2-weighted midsagittal thoracic and lumbar MRI. (c) Preoperative T2-weighted axial MRI T11-T12. (d) Preoperative T2-weighted axial MRI L1.
case_images: SNI-15-123-g001.jpg
case_images: PMC11090601_01_SNI-15-123-g001.jpg
case_images: F1
case_images: Thoracic and lumbar spine magnetic resonance imaging (MRI) demonstrated a large dorsal extradural meningeal cyst at T11-L2 with associated neural foraminal extension and bony expansion [Figure 1].
case_images: Preoperative T2-weighted sagittal lumbar magnetic resonance imaging, arrow pointing at L1 dural defect.
case_images: SNI-15-123-g002.jpg
case_images: PMC11090601_01_SNI-15-123-g002.jpg
case_images: F2
case_images: On imaging, there is a flow void noted at L1 on the left side, thought to be the site of a dural defect leading to the cyst [Figure 2].
case_images: Extradural cyst.
case_images: SNI-15-123-g003.jpg
case_images: PMC11090601_01_SNI-15-123-g003.jpg
case_images: F3
case_images: Intraoperatively, the extradural cyst wall was located dorsally [Figure 3].
case_images: Nerve root dural defect.
case_images: SNI-15-123-g004.jpg
case_images: PMC11090601_01_SNI-15-123-g004.jpg
case_images: F4
case_images: A dural defect at the L1 nerve root was confirmed [Figure 4].
case_images: Postoperative T2-weighted midsagittal thoracic and lumbar magnetic resonance imaging.
case_images: SNI-15-123-g005.jpg
case_images: PMC11090601_01_SNI-15-123-g005.jpg
case_images: F5
case_images: Repeat imaging four months postoperatively demonstrated no residual extradural meningeal cyst [Figure 5].