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. 2021 May 24;11(6):939. doi: 10.3390/diagnostics11060939

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Pseudo-delay in retinal circulation. A patient in the exudative stage of BRC exhibits no fluorescein marking of large veins at 42.3 s. (a) and 47.4 s (b) after injection. This is not due to an increase of arterio-venous circulation time, but to massive extrusion of the small fluorescein molecule from retinal capillaries and larger vessels. This phenomenon is revealed by ICGA; opacification of large veins occurs normally at 24.0 s (c), as the large ICG complex does not extrude from retinal vessels.