Choroidal vascular hyperpermeability and punctate hyperfluorescent spot in choroidal neovascularization

Area of Science:

• Ophthalmology
• Medical Imaging

Background:

• Choroidal neovascularization (CNV) is a leading cause of vision loss.
• Understanding the specific features of different CNV subtypes is crucial for diagnosis and treatment.

Purpose of the Study:

• To determine the prevalence of choroidal vascular hyperpermeability and punctate hyperfluorescent spots in various forms of CNV.
• To explore potential shared pathophysiology between these findings.

Main Methods:

• Retrospective analysis of 382 eyes with different types of CNV.
• Evaluation of indocyanine green angiography (ICGA) images for choroidal vascular hyperpermeability and punctate hyperfluorescent spots.
• Categorization included typical exudative AMD, polypoidal choroidal vasculopathy (PCV), retinal angiomatous proliferation (RAP), and myopic CNV.

Main Results:

• Choroidal vascular hyperpermeability was observed in 12.4% of typical AMD and 26.9% of PCV cases, but not in RAP or myopic CNV.
• Punctate hyperfluorescent spots were prevalent in PCV (72.4%) and typical AMD (43.3%), but less so in RAP (10.8%) and myopic CNV (4.7%).
• A high concordance (98.2%) was found between choroidal vascular hyperpermeability and punctate hyperfluorescent spots when both were present.

Conclusions:

• Choroidal vascular hyperpermeability and punctate hyperfluorescent spots likely share a common pathophysiological basis.
• The low prevalence in RAP and myopic CNV suggests these findings may not be universally normal and could indicate compromised choroidal perfusion or thinning.