Figure 5.

This figure shows orbital hydatid disease in a 62-year-old man with right-sided proptosis, ocular pain, and decreased visual acuity from three months ago. Coronal MR imaging at the orbital apex level shows a well-demarcated simple cyst with a hypointense signal on T1W and a hyperintense signal on T2W. The cystic lesion is located in the posterior aspect of the orbit, compatible with a diagnosis of hydatid cyst (arrow). The patient underwent surgical excision of the cyst and histopathologic examination confirmed the diagnosis of hydatid disease. The patients’ post-operative visual acuity improved significantly following cyst excision. This figure was obtained from a patient admitted to the authors’ institution and was not previously published elsewhere.