[Role of the vitreous in retinal neovascularization evaluated by a comparison of central retinal vein occlusion and branch retinal vein occlusion].
Thirty three patients (33 eyes) with central retinal vein occlusion (CRVO) and 80 patients (81 eyes) with branch retinal vein occlusion (BRVO) were studied in an attempt to investigate the role of the vitreous in the formation of retinal neovascularization. All these eyes had some areas of capillary nonperfusion confirmed by fluorescein angiography and no scatter photocoagulation before the first examination. The incidence of new vessels at the optic disc (NVD) in CRVO was not significantly different from that in BRVO. However, the incidence of new vessels elsewhere (NVE) in CRVO was significantly less than that in BRVO. Follow-up vitreous examination of 36 cases while they had not developed NVD and/or NVE showed a higher incidence of posterior vitreous detachment from the mid-peripheral retina (MP-PVD) in CRVO than in BRVO. On the other hand, there was no statistically significant difference in the incidence of posterior vitreous detachment from the optic disk (D-PVD) between CRVO and BRVO. The high incidence of MP-PVD in CRVO may explain the low incidence of NVE in CRVO.
Kado
M
M
Hirokawa
H
H
Yoshida
A
A
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015861:Retinal Neovascularization / Q000209:etiology / Q000503:physiopathology*; D012170:Retinal Vein Occlusion / Q000150:complications / Q000503:physiopathology*; D014822:Vitreous Body / Q000473:pathology / Q000503:physiopathology*