Benign Triton Tumor of the Trigeminal Nerve
Dalys E. Castroa,
Karthikram Raghurama and
C. Douglas Phillipsb
a Department of Radiology, University of Virginia Health System, Charlottesville, VA 22903
b Division of Neuroradiology, Department of Radiology, University of Virginia Health System, Charlottesville, VA 22903
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FIG 1. Unenhanced axial CT scan shows a hyperattenuated mass in the right parasellar region and Meckel’s cave (double arrows). Remodeling of the petrous apex is also noted (single white arrow).
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FIG 2. Bone windows on axial CT scan show a smoothly enlarged right foramen ovale (arrow).
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FIG 3. Unenhanced T1-weighted axial MR image shows the mass in the right parasellar and right Meckels cave region (double arrows). Also seen is the medially located cystic component (short broad arrow).
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FIG 4. Axial T2-weighted image demonstrates the markedly hypointense parasellar mass (small arrow) and the very hyperintense cystic component in the prepontine cistern (broad arrow).
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FIG 5. Coronal postcontrast T1-weighted image shows intense enhancement of the right parasellar mass (double arrows), with the enhancement extending into the foramen ovale (single arrow).
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FIG 6. Axial postcontrast T1-weighted image shows intense enhancement of the right parasellar mass (double arrows), with the nonenhancing posterior fossa cystic abnormality (single arrow).
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FIG 7. Axial postcontrast T1-weighted image shows intense enhancement of the right parasellar mass (double arrows), with the nonenhancing posterior fossa solid component (single broad arrow) adjacent to the trigeminal root entry zone.
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