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Isolated Intraconal Meningioma Publisher



Rajabi MT1 ; Cheraqpour K1 ; Mohammadi SS1, 6 ; Veshagh M2 ; Lazarjani SZP1, 3 ; Hosseinzadeh F4 ; Amoli FA5 ; Hosseini S1
Authors
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Authors Affiliations
  1. 1. Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Ophthalmic Research Center, Research Institute for Ophthalmology and Vision Science, Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Department of Ophthalmology, Guilan University of Medical Sciences, Rasht, Iran
  4. 4. ENT and Head & Neck Research Center, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
  5. 5. Pathology Department, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Department of Ophthalmology, Abadan University of Medical Sciences, Abadan, Iran

Source: Journal of Ophthalmic and Vision Research Published:2021


Abstract

Purpose: To report a rare case of isolated intraconal meningioma. Case Report: A 24-year-old woman presented with painless proptosis in her left eye which started and progressed during her pregnancy about 10 months ago. Hertel exophthalomometry revealed anterior displacement of the globe with 4 mm of proptosis which was remarkable. Magnetic resonance imaging (MRI) demonstrated an intraconal circumscribed oval-shaped mass with hypointense signals on T1-weighted images and hyperintense signals on T2-weighted images, mimicking cavernous hemangioma. This mass, however, was free of any connections to optic nerve or bones. Due to the imaging characteristics, more prevalent diagnoses like cavernous hemangioma were placed on the top of the differential diagnoses list. However, during the surgical excision, the tumor's consistency and gross features were not compatible with cavernous hemangioma. The pathologic findings instead determined meningotheliomatous meningioma, a very rare condition, which was far from our expectations prior to the surgery. Conclusion: Ectopic orbital meningiomas are rare tumors that are not easily diagnosed without postoperative histopathology. Despite its low prevalence, they should be considered in the differential diagnosis list of intraconal masses with hypointense signals on T1-weighted images and hyperintense signals on T2-weighted images. © 2021 RAJABI ET AL. THIS IS AN OPEN ACCESS ARTICLE DISTRIBUTED UNDER THE CREATIVE COMMONS ATTRIBUTION LICENSE | PUBLISHED BY KNOWLEDGE E