Retinal artery occlusion following intravitreal anti-VEGF therapy.
OBJECTIVE
Anti-vascular endothelial growth factor (anti-VEGF) therapy effectively inhibits angiogenesis and is now enjoying widespread use in the treatment of age-related macular degeneration (AMD). It may also have a role in the treatment of macular oedema secondary to other conditions. VEGF is a signalling molecule that has a variety of roles, including vasoregulation and effects on the coagulation homeostasis. Anti-VEGF therapy may therefore have adverse effects on ocular blood flow.


METHODS
Two cases of retinal artery occlusion after intravitreal injection of anti-VEGF are presented. Both patients were given the treatment to reduce macular oedema secondary to central retinal vein occlusion. Possible mechanisms are discussed.


RESULTS
Patient 1 developed a central retinal artery occlusion within 1 month of an intravitreal injection of ranibizumab (Lucentis). The macular oedema was totally resolved at 1 month; final visual acuity (VA) was light perception. Patient 2 developed a branch retinal artery occlusion in the macula 2 days after an intravitreal injection of bevacizumab (Avastin). The macular oedema was almost resolved within 1 week and did not recur; final VA was 0.6.


CONCLUSIONS
Anti-VEGF therapy may have a role in the treatment of macular oedema caused by central retinal vein occlusions. However, our report indicates that the therapeutic principle may be associated with an increased risk of retinal arterial occlusions.
von Hanno
Therese
T
Department of Ophthalmology, Nordland Hospital, Bodø, Norway. thvhanno@online.no
Kinge
Bettina
B
Fossen
Kristian
K
D000328:Adult; D000368:Aged; D020533:Angiogenesis Inhibitors / Q000008:administration & dosage / Q000009:adverse effects*; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000009:adverse effects*; D061067:Antibodies, Monoclonal, Humanized; D000068258:Bevacizumab; D006801:Humans; D007267:Injections; D008269:Macular Edema / Q000175:diagnosis / Q000188:drug therapy; D008297:Male; D000069579:Ranibizumab; D015356:Retinal Artery Occlusion / Q000139:chemically induced* / Q000175:diagnosis; D041623:Tomography, Optical Coherence; D042461:Vascular Endothelial Growth Factor A / Q000037:antagonists & inhibitors*; D014792:Visual Acuity; D014822:Vitreous Body
D020533:Angiogenesis Inhibitors; D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D042461:Vascular Endothelial Growth Factor A; D000068258:Bevacizumab; D000069579:Ranibizumab