PMC6461752_01
Magnetic resonance images of the cervical spine showing a mass extending from the left epidural space to the paravertebral muscles at the C1/C2 level. a Axial T1-weighted image showing a lesion with heterogeneous isointensity. b Axial T2-weighted image showing a lesion with heterogeneous low signal intensity. c Axial T1-weighted image after administration of intravenous gadolinium-DTPA (dimeglumine) showing obvious gadolinium-DPTA enhancement. d Sagittal T2-weighted image showing an isointense mass at C1/C2. e, f Sagittal T2-weighted image showing a mass with low signal intensity and an intramedullary high signal intensity area at C1/C2
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Fig1
T1-weighted images (T1WI) and heterogeneously hypointense on T2-weighted images (T2WI) and showed heterogeneous enhancement on gadopentetate dimeglumine (Gd-DTPA)-enhanced T1WI (Fig. 1a-e). The cervical spinal cord was displaced to the left laterally by the tumor and T2WI showed changes in intramedullary signal intensity (Fig. 1f).
Coronal (a), sagittal (b, c), and axial (d) computed tomographic images of the bone window showing no bone erosion
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Fig2
No bone erosion was seen on computed tomography (CT) (Fig. 2).
Pathologic results. a Photomicrograph of the surgical specimen showing a cellular component composed of small mononuclear cells (arrows) and a normal tendon component (arrowheads) (x40). b Photomicrograph of the cellular lesion showing proliferative mononuclear cells with round to oval nuclei (arrow). Multinucleated osteoclast-type giant cells (arrowheads) are also seen (x200)
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Fig3
Histopathologically, the resected specimen consisted of both tumor and normal tendon components (Fig. 3a). In the tumor component, hematoxylin and eosin staining showed proliferation of mononuclear cells and some osteoclast-like multinucleated giant cells (Fig. 3b).
Magnetic resonance images of the cervical spine at 3 years after the surgery. Axial (a) and sagittal (b) T1-weighted images after administration of intravenous gadolinium-DTPA (dimeglumine), and sagittal T2-weighted image (c) showing no recurrence of tumor
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Fig4
MRI at 3 years after the surgery revealed no recurrence (Fig. 4).