PMC5385865_01
Fundus photography images in Case 1. a Image obtained at initial evaluation. Preretinal hemorrhages can be seen around the optic disc in the patient's right eye (arrow). In the left eye, fibrovascular membranes and a traction retinal detachment around the optic disc (arrow) are seen. b Image obtained at the time of retinal detachment after the initial surgery. Intermittent, well-defined sheathing of the retinal arterioles (arrow) is apparent in both eyes. The retinal veins appear normal. c Image of silicone oil after reoperation. Persistent sheathing of the retinal arterioles (arrow) is apparent more than 6 months after surgery.
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f1
In her left eye, fibrovascular membranes of the optic disc extended inferiorly, and partial traction retinal detachment (TRD) was evident (Fig. 1a). At the time of this reRD, some well-demarcated sheathing of the retinal arterioles was intermittently observed, primarily at the posterior pole (Fig. 1b), yet no retinal vein abnormalities were seen. Silicone oil tamponade was performed at reoperation, but the sheathing persisted for more than 1 year after surgery (Fig. 1c).
Fundus angiography (FA) and optical coherence tomography (OCT) images of the right eye in Case 1. a, b FA of the right eye. Blood flow is maintained at areas of retinal artery sheathing (white arrows). c OCT image of the same area. High reflectance and acoustic shadows of the vessel walls (black arrows) are evident.
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f2
Fluorescein fundus angiography (FA) before the reoperation showed that blood flow was maintained at the sites of sheathing, with no dye leakage (Fig. 2a, b). Optical coherence tomography (OCT) after the reoperation showed high reflectance and remarkable acoustic shadows of the vessel walls corresponding to the areas of sheathing (Fig. 2c).
PMC5385865_02
Fundus photography images in Case 2. At initial evaluation, the fundus could not be visualized because of the vitreous hemorrhage. a Image obtained after the initial surgery. No retinal artery sheathing (arrow) is seen immediately after surgery. b At the time of retinal detachment, marked sheathing of the retinal arterioles (arrow) is apparent. c Image obtained at the time of retinal redetachment shows persistent sheathing (arrow). d No changes in findings are seen (arrow).
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f3
Following surgery, the fundus could clearly be observed (Fig. 3a). Fundus findings at this time showed marked sheathing of the retinal arterioles, which had not been observed after the initial surgery (Fig. 3b). Silicone oil tamponade and retinopexy were performed at reoperation, but sheathing persisted, the same as in Case 1 (Fig. 3c, d).
Fundus angiography and optical coherence tomography images of the right eye in Case 2. a, b Blood flow is maintained at the areas of retinal artery sheathing (white arrows), the same as in Case 1. c High reflectance and acoustic shadows of the vessel walls (black arrows) are apparent.
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f4
The FA and OCT findings were similar to those in Case 1 (Fig. 4a-c).