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Primary Adenomatous Tumor of the Middle Ear: A case report Toshihiko KUROIWA 1,4 , Keita MORIWAKI 1 , Shiro NAGASAWA 1 , Tomio OHTA 1 , Akira TSUTSUMI 2 , Harushi TANABE 3 1Department of Neurosurgery, Osaka Medical College 2Central Laboratory, Osaka Medical College 3Department of Neurosurgery, Osaka Mishima Critical Care Medical Center Keyword: Adenomatous tumor , Middle ear , CT , MRI pp.463-466
Published Date 1993/5/10
DOI https://doi.org/10.11477/mf.1436900651

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  • Abstract
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A case of primary adenomatous tumor of the middle ear is described. A 16-year-old male was admitted with a one-year history of left hearing disturbance. Skull X-ray disclosed destruction of the left petrous bone. Computed tomographic scans revealed an iso-dense mass in the left petrous hone, which was slightly enhanced. The tumor appeared as a low intensity mass on T1-weighted magne-tic resonance image (MRI) and as high-intensity mass on T2-weighted MRI, and was enhanced by Gd-DTPA.Fluid in the peritumoral area showed high intensity on Ti-and T2-weighted MRI. External carotid angiography revealed a marked tumor stain fed by the ascending pharyngeal artery. At operation, the tumor was found to be soft and to bleed easily. Histological diagnosis was adenomatous tumor presenting a papillary pattern. Ade-nomatous tumor of the middle ear is rare and difficult to classify. Nevertheless, papillary adenomatous tumor of the middle ear could often be aggressive and malignant in behavior and this patient will require long-term follow up. This is the first report to our knowledge of MRI find-ings about primary adenomatous tumor of the middle ear.


Copyright © 1993, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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