Arrigo Alessandro, Carnevali Adriano, Sacconi Riccardo, Querques Lea, Querques Giuseppe, Bandello Francesco
Department of Ophthalmology, University Vita-Salute, IRCCS Ospedale San Raffaele, Milan, Italy.
Department of Ophthalmology, University of "Magna Graecia", Catanzaro, Italy.
Am J Ophthalmol Case Rep. 2018 Jun 20;11:92-94. doi: 10.1016/j.ajoc.2018.06.009. eCollection 2018 Sep.
To report a case of a patient affected by branch retinal vein occlusion (BRVO) showing a possible spontaneous retinal-choroidal anastomosis (RCA) at the level of the fovea.
A 72 years old male patient with diagnosis of BRVO of left eye (LE) one year before came to our observation for a follow-up visit.The patient underwent a complete ophthalmologic examination, including fluorescein angiography, structural optical coherence tomography (OCT), OCT-Angiography (OCT-A). Interestingly, OCT-A revealed the presence of blood flow suggestive of single collateral vessel descending from the deep capillary plexus up to and possibly below a hyperreflective subfoveal deposit.
We hypothesize that it can represent a RCA, starting from retinal capillaries and reaching the choriocapillary and choroidal vessels in order to allow a vascular shunt between the 2 circulations and thus a new passage for the blood flow. A similar condition is represented by laser-induced RCA for the treatment of non-ischemic central retinal vein occlusion in order to establish a new passage for the blood flow.
报告一例视网膜分支静脉阻塞（BRVO）患者，其在黄斑区显示出可能的自发性视网膜 - 脉络膜吻合（RCA）。
一名72岁男性患者，一年前被诊断为左眼（LE）BRVO，前来我们处进行随访检查。患者接受了全面的眼科检查，包括荧光素血管造影、结构光学相干断层扫描（OCT）、OCT血管造影（OCT - A）。有趣的是，OCT - A显示存在血流，提示有一条单一的侧支血管从深层毛细血管丛向下延伸至黄斑下高反射沉积物处甚至可能更低。
我们推测这可能代表一种RCA，它从视网膜毛细血管起始，延伸至脉络膜毛细血管和脉络膜血管，从而在两个循环之间形成血管分流，进而为血流开辟一条新通道。类似情况可见于激光诱导的RCA，用于治疗非缺血性视网膜中央静脉阻塞以建立血流新通道。
