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  • Title: SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN RICKETTSIAL RETINITIS.
    Author: Kahloun R, Jelliti B, Ksiaa I, Ben Amor H, Zaouali S, Lupidi M, Ben Yahia S, Khairallah M.
    Journal: Retin Cases Brief Rep; 2019; 13(4):348-351. PubMed ID: 28614137.
    Abstract:
    PURPOSE: To report optical coherence tomography angiography findings in a patient with rickettsial retinitis. METHODS: A 29-year-old man complaining of acute blurring vision in the right eye associated with Rickettsia conorii infection underwent a comprehensive ocular examination, fluorescein angiography, spectral-domain optical coherence tomography, and swept-source optical coherence tomography angiography. RESULTS: Funduscopy showed two large areas of retinitis in the inferior macula along the distribution of the inferotemporal artery with associated retinal hemorrhages, retinal edema, and serous retinal detachment. Fluorescein angiography showed early hypofluorescence and late staining of white retinal lesions and associated adjacent retinal vascular leakage and optic disc hyperfluorescence. Optical coherence tomography angiography showed hypointense dark areas in the superficial capillary plexus and larger hypointense areas in the deep capillary plexus, outer retina, and choriocapillaris layer. The patient was treated with doxycycline and prednisone. Six weeks after presentation, retinal changes seen at the acute phase had resolved, leading to mild residual retinal pigment epithelial changes. Fluorescein angiography showed retinal capillary nonperfusion within areas of resolved retinitis. Spectral-domain optical coherence tomography findings included inner retinal atrophy, intraretinal cysts, and disruption of ellipsoid zone and interdigitation zone. Swept-source optical coherence tomography angiography showed well-delineated hypointense greyish areas of retinal capillary nonperfusion in both the superficial and deep capillary plexuses. Visual field testing revealed the presence of a corresponding paracentral defect. CONCLUSION: Optical coherence tomography angiography may be a valuable noninvasive imaging technique for detecting and analyzing occlusive complications associated with rickettsial retinitis.
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