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. 2013 Fall;4(3):e166–e175. doi: 10.2500/ar.2013.4.0064

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Copyright © 2013, OceanSide Publications, Inc., U.S.A.

This publication is provided under the terms of the Creative Commons Public License ("CCPL" or "License"), in attribution 3.0 unported (Attribution Non-Commercial No Derivatives (CC BY-NC-ND)), further described at: http://creativecommons.org/licenses/by-nc-nd/3.0/legalcode. The work is protected by copyright and/or other applicable law. Any use of the work other then as authorized under this license or copyright law is prohibited.

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Figure 7. — Preoperative (A) coronal, (B) sagittal T1-MRI postcontrast, and (C) axial T2-MRI depict a 2.6 × 2.4 × 2.4-cm spherical, well-circumscribed extra-axial lesion centered to the right of midline arising from the ethmoid roof. Extension into the olfactory groove and intracranial compartment are evident with displacement of the right frontal lobe. Note that the mass is isointense and hyperintense on T1- and T2-weighted images, respectively, with a peripheral rim of smooth enhancement. An additional focal area of nodular enhancement involving the inferior aspect of the lesion is also present. MRI, magnetic resonance imaging.