PMC6727451_01
T2-weighted sagittal magnetic resonance image showed that the cord was compressed severely, one line of the ventral dura was divided into two by a disc herniation and it seemed to be a "Y," so it was called "Y-sign."
JOCR-9-30-g001.jpg
PMC6727451_01_JOCR-9-30-g001.jpg
F1
T2-weighted sagittal magnetic resonance image (MRI) showed a C6-C7 herniated disc compressing the cord and we could see the "Y-sign" (Fig. 1)described by Sasaji et al., which meant that one line of the ventral dura was divided into two by a disc herniation and it seemed to be a "Y."
T2-weighted axial magnetic resonance image showed that the spinal cord is significantly compressed to the right by a large disc herniation-like mass on the left side.
JOCR-9-30-g002.jpg
PMC6727451_01_JOCR-9-30-g002.jpg
F2
T2-weighted axial MRI showed that the spinal cord is significantly compressed to the right by a large disc herniation-like mass on the left side (Fig. 2). The mass did not present contrast enhancement in the gadolinium-enhanced MRI (Fig. 3).
In the gadolinium-enhanced magnetic resonance image, the mass did not present contrast enhancement.
JOCR-9-30-g003.jpg
PMC6727451_01_JOCR-9-30-g003.jpg
F3
T2-weighted axial MRI showed that the spinal cord is significantly compressed to the right by a large disc herniation-like mass on the left side (Fig. 2). The mass did not present contrast enhancement in the gadolinium-enhanced MRI (Fig. 3).
Intraoperative photograph before removal of the herniated disc fragment. On opening the dura, the top of the disc fragment (arrow) was visualized.
JOCR-9-30-g004.jpg
PMC6727451_01_JOCR-9-30-g004.jpg
F4
After opening the dura, larger pieces of nucleus pulpous were exposed (Fig. 4), with cerebrospinal fluid (CSF) leakage, and then, we clamped out the mass.
The height of anterior and middle column was satisfactorily reconstructed in the post-operative anterior-posterior and lateral X-ray (a) and computed tomography scans (b).
JOCR-9-30-g005.jpg
PMC6727451_01_JOCR-9-30-g005.jpg
F5
The height of anterior and middle columns was restored on the post-operative plain radiographs and CT scans (Fig.5).
No "Y-sign"was observed in the post-operative T2-weighted sagittal magnetic resonance image.
JOCR-9-30-g006.jpg
PMC6727451_01_JOCR-9-30-g006.jpg
F6
T2-weighted sagittal MRI any more (Fig. 6). The patient proposed no complaint during the post-operative follow-up.