中华眼底病杂志

中华眼底病杂志

外层视网膜管形结构

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外层视网膜管形(ORT)是光相干断层扫描B扫描上圆形或卵圆形强反射边界包绕弱反射空间的结构,位于外核层及Henle纤维层。其最常见于渗出型老年性黄斑变性和弹性纤维假黄瘤,也可见于多灶性脉络膜炎、全葡萄膜炎、地图样萎缩、中心性浆液性脉络膜视网膜病变、息肉样脉络膜血管病变及无脉络膜症等脉络膜或外层视网膜结构破坏相关疾病。ORT是外界膜和椭圆体带连接完整性遭到破坏后在自我修复的过程中形成错位连接的结构,视网膜囊样水肿、视网膜下液及光感受器层破坏是ORT形成的重要因素。抗血管内皮生长因子(VEGF)药物治疗无法使ORT消失,区分ORT与视网膜囊样水肿有利于避免不必要的抗VEGF药物治疗。ORT对视力预后也有一定预测价值,对临床治疗具有指导意义。但由于ORT的形成机制及其与临床的关系尚未完全明确,未来需要更先进的图像设备及更大量的病例积累研究其病变形成及其与经典脉络膜新生血管、视网膜下纤维瘢痕及视网膜萎缩的关系。

Outer retinal tubulations (ORT) are tubular structures that are visualized on spectral domain optical coherence tomography in single B-scans as nonedematous circular or ovoid structures at the level of the outer nuclear layer. It is most commonly seen in exudative age-related macular degeneration and pseudoxanthoma elasticum, as well as in multifocal choroiditis, panuveitis, geographic atrophy, central serous chorioretinopathy, polypoid choroidal neovascularization, choroideremia and some other diseases related to outer retinal structural damage. ORT is the structure of dislocation junction of outer membrane and ellipsoid band in the process of self-repair after destroyed. Cystoid retinal edema, subretinal fluid and photoreceptor layer damage are important factors for ORT formation. Anti-vascular endothelial growth factor (VEGF) drugs cannot make ORT disappear, and distinguishing between ORT and retinal cystoid edema is helpful to avoid unnecessary anti-VEGF treatment. ORT has a certain predictive value for the prognosis of vision, and has guiding significance for clinical treatment. However, the mechanism of ORT formation and its relationship with clinical practice are not yet fully understood. More advanced imaging equipment and a large number of cases are needed to study the formation of ORT and its relationship with classical choroidal neovascularization, retinal fibrous scarring and retinal atrophy.

关键词: 外层视网膜管形; 体层摄影术,光学相干; 综述

Key words: Outer retinal tubular; Tomography, optical coherence; Review

引用本文: 王晓玲, 陈长征. 外层视网膜管形结构. 中华眼底病杂志, 2018, 34(5): 512-514. doi: 10.3760/cma.j.issn.1005-1015.2018.05.024 复制

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