Arteriovenous anastomoses.
D001165:Arteriovenous Malformations / Q000175:diagnosis*; D005451:Fluorescein Angiography; D006801:Humans; D011859:Radiography; D012161:Retinal Artery / Q000002:abnormalities*; D012169:Retinal Vein / Q000000981:diagnostic imaging*; D013577:Syndrome