Abstract：
BACKGROUND: Congenital arterial peripapillary loops are rare entities and very few cases are described in literature.
METHODS: A 25-year-old Asian man presented a diffuse vitreous hemorrhage in his Left Eye (LE). OCT-A revealed the presence of bilateral vascular loops at the optic nerve head. Fluorescein angiography (FA) confirmed the vascular abnormality in both eyes, with arterial filling in early phases and no dye leakage. At twenty days of follow up, the vitreous hemorrhage in the LE completely reabsorbed and BCVA improved from 20/63 to 20/20.
CONCLUSIONS: Congenital peripapillary loops should be considered in the differential diagnosis of vitreous hemorrhage, especially in young patients with no history of ocular/head trauma. Multimodal imaging is highly recommended to properly manage the patients, avoiding unnecessary therapeutic choices.
METHODS: A 25-year-old Asian man presented a diffuse vitreous hemorrhage in his Left Eye (LE). OCT-A revealed the presence of bilateral vascular loops at the optic nerve head. Fluorescein angiography (FA) confirmed the vascular abnormality in both eyes, with arterial filling in early phases and no dye leakage. At twenty days of follow up, the vitreous hemorrhage in the LE completely reabsorbed and BCVA improved from 20/63 to 20/20.
CONCLUSIONS: Congenital peripapillary loops should be considered in the differential diagnosis of vitreous hemorrhage, especially in young patients with no history of ocular/head trauma. Multimodal imaging is highly recommended to properly manage the patients, avoiding unnecessary therapeutic choices.
摘要：
背景：先天性动脉乳头周围环是罕见的实体，文献中描述的病例很少。
方法：一名25岁的亚裔男性左眼（LE）出现弥漫性玻璃体出血。OCT-A显示视神经乳头存在双侧血管环。荧光素血管造影（FA）证实了双眼的血管异常，早期动脉充盈，无染料渗漏。在二十天的随访中，LE的玻璃体出血完全重新吸收，BCVA从20/63改善到20/20。
结论：玻璃体出血的鉴别诊断应考虑先天性乳头周围环，特别是在没有眼/头部外伤史的年轻患者中。强烈建议多模态成像以正确管理患者，避免不必要的治疗选择。
方法：一名25岁的亚裔男性左眼（LE）出现弥漫性玻璃体出血。OCT-A显示视神经乳头存在双侧血管环。荧光素血管造影（FA）证实了双眼的血管异常，早期动脉充盈，无染料渗漏。在二十天的随访中，LE的玻璃体出血完全重新吸收，BCVA从20/63改善到20/20。
结论：玻璃体出血的鉴别诊断应考虑先天性乳头周围环，特别是在没有眼/头部外伤史的年轻患者中。强烈建议多模态成像以正确管理患者，避免不必要的治疗选择。
