Japanese
English
- 有料閲覧
- Abstract 文献概要
- 1ページ目 Look Inside
- 参考文献 Reference
要約 目的:高齢で虹彩動静脈奇形と診断された症例を報告する。
症例:73歳,男性。60歳台より不定期に眼科を受診し,左眼の白内障手術の既往があった。右眼の霧視を主訴に白内障手術を希望し,名古屋市立大学附属東部医療センターを受診した。初診時,左矯正視力1.2,眼圧14mmHgであった。結膜・強膜の血管異常はなく,虹彩の色素がやや薄く3-6時方向に蛇行・拡張した異常血管を認めた。前眼部光干渉断層撮影(OCT)では異常血管に一致して囊胞状の低輝度病変が存在し,光干渉断層血管撮影(OCTA)では同部位に一致して血流を認めた。隅角に新生血管はなく,網膜・硝子体にも異常所見はなかった。前眼部蛍光造影検査では早期から明瞭な血管が描出され,後期に蛍光漏出は認めず,虹彩動静脈奇形と診断した。
結論:高齢になって発見された虹彩動静脈奇形の1例を経験した。鑑別診断には蛍光造影検査が望ましいが,前眼部OCTおよびOCTAも有用である。
Abstract Purpose:To report a case of iris arteriovenous malformation in an elderly patient.
Case:A 73-year-old man presented to Nagoya City University East Medical Center with blurred vision in his right eye and requested cataract surgery. His ophthalmological history included irregular follow-ups since his 60s and had previously undergone cataract surgery in his left eye. Examination revealed a best-corrected visual acuity(BCVA) of 1.2(decimal notation) in the left eye, intraocular pressure of 14 mmHg, and no abnormalities in the conjunctival or scleral blood vessels. The iris displayed slightly faint pigmentation, as well as tortuous and dilated vessels in the 3−6 o'clock positions. Anterior segment optical coherence tomography(AS-OCT) revealed a hyporeflective cystic cavity, while optical coherence tomography angiography(OCTA) confirmed blood flow in the corresponding region. No neovascularization was observed in the angle, and there were no abnormal findings in the retina or vitreous. Anterior-segment fluorescein angiography revealed clearly defined blood vessels in the early phases, with no fluorescence leakage observed in the late phases. Based on these findings, the patient was diagnosed with an iris arteriovenous malformation.
Conclusion:This case highlights an iris arteriovenous malformation diagnosed in an elderly age. While anterior segment angiography remains the preferred modality for differential diagnosis, AS-OCT and OCTA also serve as valuable noninvasive diagnostic modalities.

Copyright © 2025, Igaku-Shoin Ltd. All rights reserved.