Orbital Schwannoma With Atypical Presentation

Orbital schwannomas are characteristically slow-growing benign tumors arising from peripheral sensory nerves. However, the authors' case illustrates the atypical presentation of such a tumor. A 71-year-old male presented with proptosis, visual loss, and periorbital inflammation. Sequential imaging showed continuous and rapid growth of an intraconal mass arising from the medial rectus. Excision of the mass was performed and it was histopathologically proven to be an orbital schwannoma. This patient demonstrates the atypical presentation of an orbital schwannoma, arising from an extraocular muscle with rapid progressive growth and inflammation, indicating it should be considered a differential diagnosis in orbital masses presenting as such. Address correspondence and reprint requests to Yoon-Duck Kim, MD, Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-ku, Seoul 135-710, Korea; E-mail: ydkimoph@skku.edu Received 29 July, 2017 Accepted 30 August, 2017 The authors report no conflicts of interest. Supplemental digital contents are available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (http://ift.tt/2iuFjMi). © 2018 by Mutaz B. Habal, MD.

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