Prepapillary Vascular Loops Complicated by Suspected Macroaneurysm Rupture
Figure 2
Fluorescein angiographic (FA) and indocyanine green angiographic (ICGA) images at the initial visit ((a), (b)) and one year after the initial visit ((c), (d), and (e)). (a) FA at the initial visit shows incomplete perfusion of the superior branch retinal artery (white arrow) indicating a branch retinal artery occlusion. Vascular loops can be seen. (b) ICGA at the initial visit demonstrates prepapillary vascular loops and a round hypofluorescent area with hyperfluorescent margin (black arrow) suggesting the presence of a macroaneurysm. No filling of the dye in the aneurysm-like dilatation suggests a blockage of the lumen with a thrombus. However, communication with this aneurysm-like dilatation and the retinal artery is unclear. (c) Early venous phase FA one year after the initial visit shows venous and arterial prepapillary loops with spiral turns. Laminar flow is obvious within the venous loops. Fine collateral vessels (dilatation of retinal capillary vessels; blue arrow) are seen at the superotemporal aspect of the optic disc. (d) Early phase ICGA one year after the initial visit shows cilioretinal artery (red arrow). (e) Late phase ICGA clearly shows vascular loop formation and no aneurysm-like lesion at the superior aspect of the optic disc.
