Authors: Xia Song, Yang Jingyuan, Zhao Xinyu, Chen Youxin
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To investigate the characteristics of polypoidal lesions and abnormal branching vascular network (BVN) in patients with polypoidal choroidal vasculopathy (PCV) by optical coherence tomography angiography (OCTA).
A case series study was conducted.Untreated 45 eyes of 42 patients with initial diagnosis of PCV from May 2016 to April 2017 in Peking Union Medical College Hospital were enrolled.There were 26 males (27 eyes) and 16 females (18 eyes) with the average age of (68.59±8.52) years.All patients underwent fundus fluorescein angiography (FFA), indocyanine green angiography (ICGA) and OCTA.The OCTA image features and detection rate of polypoidal lesion and BVN were analyzed.The study protocol was approved by the Ethics Committee of Peking Union Medical College Hospital (No.S-K631). Written informed consent was obtained from each patient prior to any examination.
ICGA images showed obvious polyps with higper fluorescence in all PCV patients, and BVN structure was observed in the ICGA images of 38 eyes.Ring, circle, cluster or node like hyper-reflective structures were detected in polypoidal lesions in the en face OCTA images of 35 eyes, and the detection rate was 77.8% (35/45). The BVN structure was detected in the OCTA images of all the 38 eyes, with the 100% (38/38) detection rate.
OCTA can detect polypoidal lesions and BVN of PCV non-invasively, which can locate the lesion in combination with en face image and B-scan image.