PMC4898218_01
50-year-old female with intraosseous meningioma. A (axial), B (coronal), and C (axial) T1-weighted fat saturation postgadolinium with fat saturation; D, axial T2-weighted image. These images demonstrate calvarial thickening involving right sphenoid wing and lateral orbital wall (arrows), with adjacent dural enhancement overlying anterior temporal lobe encroaching on the planum sphenoidale. There is a mass effect on the right lateral rectus muscle.
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On T2-weighted images, these demonstrated slightly hyperintense signal (Fig. 1).
50-year-old female with intraosseous meningioma. Sagittal (top), coronal (middle), and axial (bottom) CT images of the orbit in bone algorithm demonstrate an infiltrative osseous mass (arrows) involving the right orbital wall, orbital apex, and adjacent sphenoid wing with extension to involve anterior clinoid process on the right. (Note: normal appearance of left clinoid process). Linear dural reaction also noted particularly on the bottom axial image (arrow).
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Noncontrast maxillofacial CT images were obtained for pre-operative planning and showed a 38.5-mm hyperostotic calvarial mass, primarily involving the right sphenoid wing, with involvement of the right lateral orbital wall, the anterior clinoid process, and the lateral wall of right sphenoid hemisinus (Fig. 2).
50-year-old female with intraosseous meningioma. Intraoperative images, showing periorbita after the lesion was drilled away. The superior orbital and a portion of the lateral orbital rim (arrow) are seen. The surgical probe directly crosses the periorbita. Surgical cotton pads directly overlie the frontal and temporal surface of the brain.
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50-year-old female with intraosseous meningioma. Medium-power microscopic section with hematoxylin and eosin stain. Meningioma (M) has invaded trabecular bone (B), forming a dense nest of meningothelial cells. Loose, spindled meningothelial cells enwrap nearby blood vessels (arrow).
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