孤立性脉络膜血管瘤光相干断层扫描血管成像影像特征观察

目的观察孤立性脉络膜血管瘤(CCH)的OCT血管成像(OCTA)影像特征。方法回顾性病例研究。2017年1月至2019年2月于南京医科大学附属眼科医院检查确诊的CCH患者18例18只眼纳入研究。其中,男性13例13只眼,女性5例5只眼;平均年龄44.5岁。所有患眼瘤体位于后极部或视盘周围,呈橘红色,边界清晰。采用OCTA仪对患眼瘤体处6 mm×6 mm或8 mm×8 mm范围进行扫描,系统自动处理图像后提供浅层毛细血管丛、深层毛细血管丛、外层视网膜、脉络膜毛细血管丛血流图以及对应的结构en-face像和B-scan像。结果OCTA检查发现,当调整分层线至脉络膜毛细血管层周围,血流图可见瘤体边界清晰,瘤体表面血管呈网状纵横交错,粗细不一。B-scan像,对应瘤体处全层视网膜脉络膜呈圆顶状隆起,神经上皮层可伴有增厚,视网膜下积液、渗出及劈裂等。结构en-face像,瘤体边界清晰,周围渗出呈点状或片状强反射,局部色素沉着呈弱反射,信号反射不均匀。结论OCTA可清晰显示CCH表面血管形态。

Optical coherence tomography angiography imaging features of isolated choroidal hemangioma

Objective To observe the OCT angiography(OCTA)imaging features of isolated choroidal hemangioma(CCH).Methods A retrospective case study.From January 2017 to February 2019,18 CCH patients(18 eyes)diagnosed in the Affiliated Eye Hospital of Nanjing Medical University were included in the study.There were 13 males(13 eyes)and 5 females(5 eyes),with the mean age of 44.5 years.All the tumors were orange-red,with clear boundaries,located at the posterior pole or around the optic disc.OCTA was used to scan the 6 mm×6 mm of macular area or in the range of 6 mm×6 mm.After automatic image processing,the system provided the blood flow map of shallow capillary plexus,deep capillary plexus,outer retina and choroidal capillary plexus,as well as the corresponding structure en-face image and B-scan image.Results OCTA examination found that when the stratification line was adjusted to the periphery of the choroidal capillary layer,the blood flow map showed clear boundary of the tumor,and the blood vessels on the surface of the tumor presented a network crisscross with different thickness.B-scan image showed that the whole layer of retinal choroid at the tumor presented a dome-shaped uplift,and the neurocortical layer could be accompanied by thickening,subretinal effusion,exudation and splitting.En-face image showed that the boundary of the tumor was clear,the surrounding exudation was strong reflection in spots or patches,local pigmentation showed weak reflection,and the signal reflection was uneven.Conclusion OCTA can clearly show the vascular morphology on the surface of CCH.