case_images: PMC8422414_01
case_images: Preoperative (a) Sagittal T2-weighted, (b) Axial T2-weighted, (c) Axial T1-weighted dorsolumbar MRI showing an intramedullary arachnoid cyst in the conus medullaris.
case_images: SNI-12-370-g001.jpg
case_images: PMC8422414_01_SNI-12-370-g001.jpg
case_images: F1
case_images: Magnetic resonance imaging (MRI) of the spine showed a well-defined intramedullary cystic lesion of size 12 x 8 x 8 mm in the conus medullaris at the T12-L1 level, which was hypointense on T1-weighted images and hyperintense on T2-weighted images with no perilesional edema, solid component, or contrast enhancement [Figure 1].
case_images: Intraoperative image showing cyst marsupialization by stitching cyst wall open edges to the arachnoid.
case_images: SNI-12-370-g002.jpg
case_images: PMC8422414_01_SNI-12-370-g002.jpg
case_images: F2
case_images: The cyst was marsupialized by suturing its wall to the arachnoid of the cord to prevent reclosure [Figure 2].