Authors: Nesrine Abroug, Imen Ksiaa, Hager Ben Amor, Bechir Jelliti, Sana Khochtali, Moncef Khairallah


Department of Ophthalmology, Fattouma Bourguiba University Hospital, Faculty of Medicine, University of Monastir, Monastir, Tunisia

Clinical presentation:  A 65-year-old diabetic man with a history of fever of unknown origin two weeks earlier complained of sudden decreased vision in the left eye. The patient was diagnosed with bilateral West Nile virus (WNV) chorioretinitis associated with occlusive retinal vasculitis in the left eye. He was evaluated using Swept-source optical coherence tomography angiography (SS OCTA)

Imaging findings: SSOCTA of the left eye showed extensive well-delineated hypointense greyish areas of retinal capillary hypoperfusion and perifoveal capillary arcade disruption in the superficial capillary plexus, and larger greyish areas of capillary hypoperfusion, capillary rarefaction, and diffuse capillary network attenuation and disorganization in the deep capillary plexus.

Discussion points: SS OCTA may be a valuable tool for assessing non-invasively occlusive retinal vasculitis associated with WNV infection. It allows an accurate detection and precise delineation of areas of retinal capillary hypoperfusion in both the superficial and deep capillary plexuses.

Financial disclosure: No