CT and MR images of patients with inverted papilloma of the maxillary sinus.A, Axial CT image of a patient with inverted papilloma shows cone-shaped focal.

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Presentation transcript:

CT and MR images of patients with inverted papilloma of the maxillary sinus.A, Axial CT image of a patient with inverted papilloma shows cone-shaped focal hyperostosis involving the posterior wall of the left maxillary sinus (arrows).B, Sagittal T2-weighted... CT and MR images of patients with inverted papilloma of the maxillary sinus.A, Axial CT image of a patient with inverted papilloma shows cone-shaped focal hyperostosis involving the posterior wall of the left maxillary sinus (arrows).B, Sagittal T2-weighted MR image of the patient clearly shows the centrifugal pattern of tumor growth with a hyperostotic focus (white arrow) at the posterior wall of the left maxillary sinus, which was confirmed to be a tumor origin by surgery.C, Axial CT image of another patient shows cone-shaped hyperostosis (arrow) involving the anterior wall of the left maxillary sinus, which was proved to be the origin of inverted papilloma by intraoperative endoscopy. D.K. Lee et al. AJNR Am J Neuroradiol 2007;28:618-621 ©2007 by American Society of Neuroradiology