G. Virgili et al., RETINAL NEOVASCULARIZATION IN A CASE OF MACULAR BRANCH RETINAL VEIN OCCLUSION, Graefe's archive for clinical and experimental ophthalmology, 235(9), 1997, pp. 603-605
Background, Retinal neovascularization (RNV) has never been described
in cases of macular branch retinal vein occlusion (MBRVO), due to the
limited amount of ischemia in this form of retinal vein occlusion. Isc
hemic areas as wide as 5-10 disc diameters were required by previous s
tudies to count as ischemic cases of central or major branch retinal v
ein occlusion. Case report. A 56-year-old woman who had been suffering
from MBRVO for 3 years presented at the posterior pole a zone of non-
perfusion, extending over 7.5 disc areas, and three small tufts of RNV
. RNV regressed after two subsequent laser treatments of the ischemia.
Retrohyaloid hemorrhage was observed 2 months after the first treatme
nt. Conclusion. Since the average diameter of the non-perfused area wa
s about 2.75 disc diameters, this case demonstrates that small RNVs ca
n appear in less extensive areas of ischemia than is generally believe
d.