Article Figures & Data
Figures
- fig 1.
Axial CT scans.
A, Nonenhanced image at the level of the foramen of Monro shows a large, left frontotemporal mass lesion with heterogeneous attenuation, including soft-tissue, cystic, and calcified components. Note the subfalcial herniation and mass effect.
B, Scan shown in A, but obtained with bone window settings, depicts curvilinear calcifications in the lateral aspect of the mass.
- fig 2.
MR images.
A and B, Sagittal (A) and axial (B) T1-weighted images (600/17 [TR/TE]) show the extent of the left frontotemporal mass. Focal areas of hypointensity are separated by isointense septa. Punctate flow voids of the left MCA are surrounded by abnormal signal intensity (arrow in A).
C, Axial T2-weighted image (2600/90) reveals focal areas of hyperintensity corresponding to the hypointensity in A and B. Septa remain relatively isointense. Curvilinear hypointensity in the lateral aspect of the mass represents calcification (arrow).
D, Axial contrast-enhanced T1-weighted image (600/17) demonstrates strong enhancement in the septa within the mass. Also note the more confluent enhancement encasing the left MCA bifurcation in the sylvian fissure (arrow).
- fig 3.
Photomicrographs show that the neoplasm involves both bone and cartilage.
A, Neoplastic chondrocytes in a chondroid matrix (pink) are adjacent to osteoblasts (purple) (hematoxylin-eosin, magnification × 200).
B, Higher-power view of an area of bone differentiation shows that atypical neoplastic osteoblasts are associated with a partially mineralized osteoid stroma (hematoxylin-eosin, magnification × 400).
C, Higher-power view of the chondrosarcoma component shows that atypical chondrocytes are scattered within a somewhat immature chondroid matrix (hematoxylin-eosin, magnification × 400).
D, The tumor has an expansive interface (arrowheads) with the surrounding gliotic brain parenchyma (asterisk) (hematoxylin-eosin, magnification × 400).
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