case_images: PMC10741817_01
case_images: Thoracic spine magnetic resonance imaging sagittal (left) and axial (right) views show the ventral cystic lesion with severe cord compression. Black arrows indicate the arachnoid cyst, and the black arrowheads indicate the compressed and displaced spinal cord.
case_images: toj-23-0029-figure1.jpg
case_images: PMC10741817_01_toj-23-0029-figure1.jpg
case_images: f1
case_images: The cyst occupied >50% of the cross-section of the spinal canal (Figure 1). The patient was diagnosed with a thoracic spinal arachnoid cyst with American Spinal Injury Association Impairment Scale grade A classification.
case_images: Intraoperative sonogram shows the spinal cord and arachnoid cyst in cross-section. The black arrow indicates the spinal cord, and the white arrow indicates the arachnoid cyst.
case_images: toj-23-0029-figure2.jpg
case_images: PMC10741817_01_toj-23-0029-figure2.jpg
case_images: f2
case_images: T6-T7 laminectomies with a limited left sixth rib costotransversectomy were performed, and the craniocaudal extent of the cyst was confirmed with the aid of intraoperative ultrasonography (Figure 2). The fifth and sixth left intercostal nerves were divided to facilitate dura mobilization, and the dura was opened along the line of the dura sleeves. The intradural extramedullary arachnoid cyst was identified and excised using microsurgical techniques (Figure 3).
case_images: Intraoperative view (via a laminectomy) of the thoracic intradural extramedullary arachnoid cyst. The white arrows indicate retracted edges of the incised dura, the black arrowhead indicates the arachnoid cyst, and the black arrow indicates the compressed spinal cord.
case_images: toj-23-0029-figure3.jpg
case_images: PMC10741817_01_toj-23-0029-figure3.jpg
case_images: f3
case_images: T6-T7 laminectomies with a limited left sixth rib costotransversectomy were performed, and the craniocaudal extent of the cyst was confirmed with the aid of intraoperative ultrasonography (Figure 2). The fifth and sixth left intercostal nerves were divided to facilitate dura mobilization, and the dura was opened along the line of the dura sleeves. The intradural extramedullary arachnoid cyst was identified and excised using microsurgical techniques (Figure 3).
case_images: Thoracic spine magnetic resonance imaging sagittal (left) and axial (right) views show complete resection of the arachnoid cyst, cord reexpansion (white arrow), a small extradural cerebrospinal fluid collection (black arrow), and associated cord edema (black arrowhead).
case_images: toj-23-0029-figure4.jpg
case_images: PMC10741817_01_toj-23-0029-figure4.jpg
case_images: f4