central retinal vein occlusion
{{Short description|Blockage of the central retinal vein in the eye}}
{{Infobox medical condition (new)
| name = Central retinal vein occlusion
| image = Eye-diagram no circles border 1.svg
| caption = Diagram of the eye; retinal vein is number 21.
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Central retinal vein occlusion, also CRVO, is when the central retinal vein becomes occluded, usually through thrombosis. The central retinal vein is the venous equivalent of the central retinal artery and both may become occluded.Ophthalmology at a Glance, Jane Olver & Lorraine Cassidy, Blackwell Science 2005.{{page needed|date=May 2015}} Since the central retinal artery and vein are the sole source of blood supply and drainage for the retina, such occlusion can lead to severe damage to the retina and blindness, due to ischemia (restriction in blood supply) and edema (swelling).{{cite journal |doi=10.1016/S0002-9394(14)70001-7 |pmid=8154523 |title=Incidence of Various Types of Retinal Vein Occlusion and Their Recurrence and Demographic Characteristics |journal=American Journal of Ophthalmology |volume=117 |issue=4 |pages=429–41 |year=1994 |last1=Hayreh |first1=Sohan Singh |last2=Zimmerman |first2=M. Bridget |last3=Podhajsky |first3=Patricia }}
CRVO can cause ocular ischemic syndrome. Nonischemic CRVO is the milder form of the disease. It may progress to the more severe ischemic type.{{EMedicine|article|1223746|Central Retinal Vein Occlusion}} CRVO can also cause glaucoma.
Diagnosis
Despite the role of thrombosis in the development of CRVO, a systematic review found no increased prevalence of thrombophilia (an inherent propensity to thrombosis) in patients with retinal vascular occlusion.{{cite journal |last1=Romiti |first1=Giulio Francesco |last2=Corica |first2=Bernadette |last3=Borgi |first3=Marco |last4=Visioli |first4=Giacomo |last5=Pacella |first5=Elena |last6=Cangemi |first6=Roberto |last7=Proietti |first7=Marco |last8=Basili |first8=Stefania |last9=Raparelli |first9=Valeria |title=Inherited and Acquired Thrombophilia in Adults with Retinal Vascular Occlusion: A Systematic Review and Meta-Analysis. |journal=Journal of Thrombosis and Haemostasis |date=2020 |volume=Online first |issue=12 |pages=3249–3266 |doi=10.1111/jth.15068 |pmid=32805772|hdl=2434/809252 |s2cid=221163392 |hdl-access=free }}
Treatment
Treatment consists of Anti-VEGF drugs like Lucentis or intravitreal steroid implant (Ozurdex) and Pan-Retinal Laser Photocoagulation usually. Underlying conditions also require treatment. CRVO without ischemia has better visual prognosis than ischemic CRVO.
A systematic review studied the effectiveness of the anti-VEGF drugs ranibizumab and pagatanib sodium for patients with non-ischemic CRVO.{{cite journal |vauthors=Braithwaite T, Nanji AA, Lindsley K, Greenberg PB |title= Anti-vascular endothelial growth factor for macular oedema secondary to central retinal vein occlusion |journal=Cochrane Database Syst Rev|volume=5 |pages= CD007325 |date=2014 |issue= 5 |pmid= 24788977|doi= 10.1002/14651858.CD007325.pub3 |pmc=4292843}} Though there was a limited sample size, participants in both treatment groups showed improved visual acuity over 6 month periods, with no safety concerns.
See also
References
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External links
{{Medical resources
| DiseasesDB = 11421
| ICD10 = {{ICD10|H|34|8|h|30}}
| ICD9 = {{ICD9|362.35}}
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| MedlinePlus = 007330
| eMedicineSubj = article
| eMedicineTopic = 798583
| MeshID = D012170
}}
{{Eye pathology}}
{{DEFAULTSORT:Central Retinal Vein Occlusion}}