case_images: PMC5851319_01
case_images: There is a slightly lobulated well-demarcated 1.4 x 1.7 x 1.2 cm intradural extramedullary mass lesion (blue arrow) in the spinal canal, anterior to the spinal cord at the level of C2-C3. There is mass effect with posterior displacement of the cord as well as cord edema. There is widening of the ventral subarachnoid space. It is homogeneously isointense on T1 and slightly heterogeneously hypointense on T2. Postcontrast imaging demonstrates avid diffusely homogenous enhancement.
case_images: CRIRA2018-6921020.001.jpg
case_images: PMC5851319_01_CRIRA2018-6921020.001.jpg
case_images: fig1
case_images: T1 isointense and T2 hypointense mass at the level of C2-C3, anterior to cervical spinal cord and resulting in severe spinal canal stenosis. There is mass effect with posterior displacement of the cord, cord compression, and cord edema (Figures 1(a) and 1(b)).
case_images: 10x magnification of chondroid and mesenchymal portions.
case_images: CRIRA2018-6921020.002.jpg
case_images: PMC5851319_01_CRIRA2018-6921020.002.jpg
case_images: fig2
case_images: It was determined to show biphasic pattern with densely cellular regions of small anaplastic cells and other areas of chondroid differentiation, consistent with diagnosis of mesenchymal chondrosarcoma (Figures 2-4).
case_images: 10x magnification of chondroid portion.
case_images: CRIRA2018-6921020.003.jpg
case_images: PMC5851319_01_CRIRA2018-6921020.003.jpg
case_images: fig3
case_images: It was determined to show biphasic pattern with densely cellular regions of small anaplastic cells and other areas of chondroid differentiation, consistent with diagnosis of mesenchymal chondrosarcoma (Figures 2-4).
case_images: 20x magnification of mesenchymal portion.
case_images: CRIRA2018-6921020.004.jpg
case_images: PMC5851319_01_CRIRA2018-6921020.004.jpg
case_images: fig4
case_images: It was determined to show biphasic pattern with densely cellular regions of small anaplastic cells and other areas of chondroid differentiation, consistent with diagnosis of mesenchymal chondrosarcoma (Figures 2-4).
case_images: Axial NECT (Figure 5(a)) and sagittal NECT (Figure 5(b)) of cervical spine demonstrate surgical changes secondary to posterior spinal decompression (green arrows) at C2 and C3 levels, as well as a well-defined soft tissue density lesion (red arrows) anterior to cervical spinal cord (orange arrows) at C2-C3.
case_images: CRIRA2018-6921020.005.jpg
case_images: PMC5851319_01_CRIRA2018-6921020.005.jpg
case_images: fig5
case_images: Nonenhanced CT (NECT) of cervical spine was performed at an outside institution for radiotherapy planning (Figures 5(a) and 5(b)).