Arterioarterial collaterals due to a prepapillary vascular loop

Published:April 01, 2020DOI:
      A 57-year-old male with floaters in the left eye for 3 weeks presented to our institute. He reported recurrent vitreous hemorrhages in this eye since childhood. The right fundus was unremarkable. The left fundus demonstrated a prepapillary vascular loop (PVL) and retinal vascular anastomoses crossing the temporal raphe (Fig. 1). Ultra-wide-field fluorescein angiography disclosed arterial filling of the PVL and peripheral arterioarterial collaterals without leakage.
      Fig 1
      Fig. 1Top panel: Ultra-wide-field color photograph of the left eye. Note the prepapillary arterial loop (arrowhead) and the arterioarterial collaterals (arrows). Middle panel: Wide-field fluorescein angiogram (FA) of the left eye shows arterial phase filling of the prepapillary arterial loop (arrowhead) and arterioarterial collaterals (arrows) crossing the temporal raphe. Bottom panel: Late-phase ultra-wide-field FA of the left eye illustrates all collaterals (arrows) crossing the temporal raphe.
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