label: Arteriovenous crossing sign
label_lc: arteriovenous crossing sign
description: A retinal vascular abnormality characterized by indentation or compression of a retinal vein at an arteriovenous crossing, leading to changes in venous caliber. AV crossing signs are commonly associated with hypertensive retinopathy and may contribute to retinal vein occlusion. They are indicative of vascular remodeling due to chronic hypertension or other systemic vascular diseases.