视网膜巨大动脉瘤(MAs)系后天性视网膜动脉扩张所致,通常发生于年龄较大的高血压病人。MAs表现为局部动脉扩张,伴有不同程度的动脉壁玻璃样变,其周围有视网膜出血和渗出。并常合并视网膜血管阻塞、栓子,全身性高血压及血管性疾病。MAs经常被误诊,应与Coats病、Leber粟粒状动脉瘤、VonHippel-Lindau综合征及毛细血管动脉瘤鉴别。MAs并非罕见,其性质尚不了解。在临床及组织学方面,MAs的特点是由具有动力学过程所形成,伴有或不伴有血-视网膜 Retinal giant aneurysms (MAs) Department of acquired retinal artery caused by the expansion, usually occurs in older hypertensive patients. MAs showed partial arterial dilatation, accompanied by varying degrees of arterial wall-like glassy changes around the retinal hemorrhage and exudation. And often associated with retinal vascular occlusion, emboli, systemic hypertension and vascular disease. MAs are often misdiagnosed and should be identified with Coats disease, Leber’s Miliary aneurysm, Von Hippel-Lindau syndrome, and capillary aneurysm. MAs are not uncommon and their nature is unknown. In clinical and histological aspects, MAs are characterized by the formation of a kinetic process, with or without blood-retinal