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KMID : 1103720130690030187
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Journal of the Korean Society of Radiology
2013 Volume.69 No. 3 p.187 ~ p.191
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CT and Magnetic Resonance Imaging Features of Middle Ear Adenoma of Neuroendocrine Differentiation: A Case Report
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Lee Sang-Kwon
Choe Mi-Sun
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Abstract
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Middle ear adenoma is a rare benign epithelial tumor. We report the CT and magnetic resonance imaging findings of a case of middle ear adenoma of neuroendocrine differentiation in a 36-year-old man. On high-resolution CT, the mass was found to fill the middle ear, in which the ossicles were embedded, but not destroyed, with outward bulging of the intact tympanic membrane. On MRI, the mass, which was intensely enhanced on 3-dimensional (3D) gadolinium (Gd)-enhanced spoiled gradient-recalled (SPGR) sequence, involved the middle ear, aditus ad antrum and a portion of mastoid antrum. Histological and immunohistochemical findings of the specimen obtained by surgical excisions were consistent with middle ear adenoma of neuroendocrine differentiation. Middle ear adenoma of neuroendocrine differentiation should be included in the differential diagnosis of an intensely enhancing mass filling the middle ear/mastoid antrum without ossicular destructions. The extent of the mass can be excellently assessed with 3D Gd-enhanced SPGR sequence.
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KEYWORD
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Adenoma, Middle Ear, Tomography, X-Ray Computed, Magnetic Resonance Imaging
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