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Detecting Abnormalities in Choroidal Vasculature in a Mouse Model of Age-related Macular Degeneration by Time-course Indocyanine Green Angiography
10:24

Detecting Abnormalities in Choroidal Vasculature in a Mouse Model of Age-related Macular Degeneration by Time-course Indocyanine Green Angiography

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Clinicopathologic correlation in hemorrhagic age-related macular degeneration

S Reynders1, B A Lafaut, S Aisenbrey

  • 1Ghent University Hospital, Ophthalmology, Ghent, Belgium.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|May 1, 2002
PubMed
Abstract

Insights

Histopathology of hemorrhagic age-related macular degeneration (AMD) membranes reveals diverse lesions. Hemorrhages occur beyond typical locations, appearing near drusen and within Bruch's membrane, offering new insights into AMD progression.

Area of Science:

  • Ophthalmology
  • Histopathology
  • Age-Related Macular Degeneration

Background:

  • Age-related macular degeneration (AMD) is a leading cause of vision loss.
  • Choroidal neovascularization (CNV) is a key pathological feature in exudative AMD.
  • Hemorrhagic AMD presents unique histopathological challenges.

Purpose of the Study:

  • To compare the histopathology of surgically extracted membranes in hemorrhagic AMD.
  • To contrast these findings with membranes from classic, mixed, and occult CNV in AMD.

Main Methods:

  • Analysis of 30 surgically removed hemorrhagic AMD membranes.
  • Comparison with 50 classic, 20 mixed, and 20 occult CNV specimens.
  • Serial sectioning and staining (H&E, Masson trichrome, PAS).

Main Results:

  • Diffuse drusen present in all hemorrhagic AMD specimens.
  • Fibrovascular tissue found in 29/30 hemorrhagic AMD specimens.
  • Hemorrhages observed in subretinal space, fibrovascular tissue, and adjacent to drusen/Bruch's membrane.

Conclusions:

  • Hemorrhagic maculopathy exhibits a wide range of histo-architectural lesions.
  • Hemorrhages in AMD are not limited to subretinal space or neovascular tissue stroma.
  • New hemorrhage locations identified: choroidal side of drusen and intra-Bruch's fibrovascular tissue.

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