PMC2816348_01
T2-weighted sagittal images in the neutral position reveals normal contour and signal intensity along the sixth to the eighth cervical segments without cervical cord compression.
jkms-19-768-g001.jpg
PMC2816348_01_jkms-19-768-g001.jpg
F1
T1- and T2-weighted cervical MRI in the neutral position were unremarkable with normal contour and signal intensity of spinal cord (Fig. 1, 3A).
(A) On T2-weighted sagittal images in the anteflexed position, there is an anterior shifting of the posterior wall of the cervical dural sac below the third cervical vertebral level compressing the cervical spinal cord from the fifth cervical to the first thoracic vertebral levels (row of white arrows). (B) On enhancement, the widened posterior epidural space shows a homogenous strong enhancement with some signal flow void, suggesting a passively widened epidural venous plexus.
jkms-19-768-g002.jpg
PMC2816348_01_jkms-19-768-g002.jpg
F2
With the neck flexion, sagittal and axial cervical MR images showed an anterior shifting of the posterior wall of the cervical dural sac below the third cervical vertebral level compressing the cervical spinal cord from the fifth cervical to the first thoracic vertebral levels (Fig. 2A). On enhancement, the widened posterior epidural space displayed a homogeneous strong enhancement with some signal flow void, suggesting a passively widened epidural venous plexus (Fig. 2B).
(A) The T1-weighted axial image of the sixth cervical cord segment in the neutral position has a normal appearance. (B) There is a striking forward compression by the posterior dural sac in the enhanced axial image of the same cervical cord segment in the anteflexed position (white arrowheads).
jkms-19-768-g003.jpg
PMC2816348_01_jkms-19-768-g003.jpg
F3
T1- and T2-weighted cervical MRI in the neutral position were unremarkable with normal contour and signal intensity of spinal cord (Fig. 1, 3A). The sixth and seventh cervical spinal segments were dynamically compressed when the patient flexed his neck forward, and the compression was more pronounced on the right side than on the left (Fig. 3B).