Tentorial Enhancement on MR Images Is a Sign of Cavernous Sinus Involvement in Patients with Sellar Tumors
Yoko Nakasua,
Satoshi Nakasua,
Ryuta Itoa,
Ko-ichi Mitsuyaa,
Osamu Fujimotoa and
Akira Saitoa
a From the Departments of Neurosurgery (Y.N., K.M.) and Radiology (R.I., O.F.), Yasu Hospital; the Department of Neurosurgery (A.S.), Nagahama Red Cross Hospital; and the Departments of Neurosurgery (S.N.) and Radiology (R.I.), Shiga University of Medical Science, Shiga, Japan.
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FIG 1. Case 1: 46-year-old woman with a growth hormone–secreting adenoma.
A, Coronal T1-weighted MR image after administration of contrast material shows a large sellar tumor compressing the right cavernous sinus. The left cavernous sinus is enhanced and normal in shape.
B, T1-weighted MR image shows clearly enhanced tentorium on the right side.
C and D, Sagittal T1-weighted images show linear enhancement of the tentorium from the posterior portion of the cavernous sinus on the right side (C). Note asymmetric tentorial enhancement sign.
E, Postoperative T1-weighted MR image after administration of contrast material shows enlarged posterior part of the cavernous sinus; however, no tentorial enhancement was seen preoperatively (C).
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FIG 2. Case 2: 26-year-old man with a nonfunctioning adenoma.
A, Coronal T1-weighted MR image shows a sellar tumor invading the left cavernous sinus.
B and C, Sagittal T1-weighted MR images show tentorial enhancement in connection with the cavernous sinus, more prominent on the left (C) than on the right (B).
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FIG 3. Case 3: 64-year-old man with a chordoma.
A and B, Coronal T1-weighted MR images show sellar tumor infiltrating into both cavernous sinuses and into the right tentorium.
C and D, Sagittal T1-weighted MR images show bilateral thick tentorial enhancement with dominance on the right side.
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