case_images: PMC3291709_01
case_images: Preoperative MRI showing abnormal signal intensities on epidural dumbbell-shaped mass (measuring 25x18x24 mm) traversing the C1 to C2 interspinous space, compressing surrounding structures. The dumbbell-shaped lesion reveals isointense on sagittal T1-WI (A), mixed hypointense on T2-WI (B), and well-enhanced after gadolinium administration (C). The spinal cord was compressed at the C2 level, and the signal change appeared on T2-WI. MRI : magnetic resonance images, WI : weighted image.
case_images: jkns-51-54-g001.jpg
case_images: PMC3291709_01_jkns-51-54-g001.jpg
case_images: F1
case_images: CT scan showed cortical osseous erosions at the lower C1 posterior arc and upper C2 spinous process. Cervical magnetic resonance images (MRI) revealed an epidural dumbbell-shaped mass traversing the C1 to C2 interspinous space, compressing the surrounding structures (Fig. 1).
case_images: Post-operative CT scan. Partial hemilaminectomy, from the lower half of the C1 posterior arch to upper half of C2 spinous process, was performed (A : mid-sagittal, B : 3-dimensional reconstruction). C : Follow-up MRI with enhancement after postoperative 2 years reveals no residual and no recurrence. CT : computed tomography, MRI : magnetic resonance images.
case_images: jkns-51-54-g002.jpg
case_images: PMC3291709_01_jkns-51-54-g002.jpg
case_images: F2
case_images: Under microscopy, the tumor was delicately dissected, and en bloc removal was achieved (Fig. 2).
case_images: Photomicrographs of the tumor reveals focal aggregation of cells with ample, clear, and foamy cytoplasm. There are large round cells with irregular vesicular nuclei. H&E, original magnification x200.
case_images: jkns-51-54-g003.jpg
case_images: PMC3291709_01_jkns-51-54-g003.jpg
case_images: F3
case_images: Upon sectioning, the mass was particularly yellow and white with cystic components (Fig. 3).
case_images: Gross finding of the tumor. A : External surface of the tumor; ovoid, yellowish, encapsulated with a white-colored adhesion scar at the mid-portion of the mass shown in the picture. B : Mid-section of the tumor, particularly yellow and white with cystic components.
case_images: jkns-51-54-g004.jpg
case_images: PMC3291709_01_jkns-51-54-g004.jpg
case_images: F4
case_images: Cervical MRI with gadolinium enhancement at 2 years after surgery demonstrated no recurrent lesion (Fig. 4). Large, round cells had irregular vesicular nuclei which were regular and small with condensed chromatin (Fig. 4).