BACKGROUND
A 39-year-old white woman presents with swelling, pain, and diplopia in her left eye. Clinical examination reveals a firm, well-defined mass in the external angle of the left orbit. Proptosis and diplopia on lateral gaze are seen. The cornea and fundus are clear. Findings from routine blood tests are normal. Orbital MRI is performed.
What is the diagnosis?
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Hint
This is a common location for a congenital lesion.
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Author:
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Ali Nawaz Khan, MBBS, FRCP, FRCS, FRCR, Lecturer, Department of Diagnostic Radiology, Faculty of Medicine, University of Manchester, and Prabhakar Rajiah, MD, FRCR, Registrar, Department of Radiology, North Manchester General Hospital NHS Trust, UK
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North Manchester General Hospital, Manchester, UK
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eMedicine Editor:
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Sat Sharma, MD
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Associate Professor, University of Manitoba, Department of Medicine, Division of Pulmonary Medicine
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eMedicine Case
