PMID: 7545629Jun 1, 1995Paper

Angiogenesis in early choroidal neovascularization secondary to age-related macular degeneration

Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie
Murray Killingsworth

Abstract

The morphological features of angiogenesis in early choroidal neovascularization secondary to age-related macular degeneration are yet to be fully described. Six eyes from five patients which on clinical and histological examination showed advanced age-related macular degeneration and early choroidal neovascularization have been studied by transmission electron microscopy. Pre-existing choroidal capillaries and venules showed changes which included endothelial cell budding, pericyte enlargement, endothelial cell sprout formation and the development of intrachoroidal new vessels. In one case, an endothelial cell sprout continuous with an intrachoroidal vessel penetrated Bruch's membrane. Examination of early subretinal pigment epithelial new vessels showed them to spread between the inner layers of Bruch's membrane within the space usually occupied by the basal linear deposit and drusen. New vessel formation took place in blind pouches at the margins of new vessel networks, either in the absence of pericytes or in the presence of mainly myofibroblast-like pericytes. This ultrastructural study describes two phases of new vessel growth associated with the onset of choroidal neovascularization secondary to age-related macular degen...Continue Reading

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