Type 1 CNV demonstrates occult leakage on fluorescein angiography. Polypoidal choroidal vasculoplathy (PCV) is a subtype of Type 1 CNV that is characterized by the presence of polyp-like aneurysmal dilations of the branching vascular network. Type 2 ("classic"), passes through the RPE and is located above the RPE in the subretinal space.

Choroidal neovascular membranes (CNVM) can be described based on its location relative to the fovea, location relative to the retinal pigment epithelium, and fluorescein angiography findings. Location relative to the fovea: Subfoveal (underneath the fovea) Juxtafoveal (1-199 microns from the fovea) Extrafoveal (behind 200 microns from the fovea)

On ICGA, CNVM has been reclassified into three different morphologic types: focal spot or “hot spot”, plaques (well or poorly defined), and mixed (i.e., a combination of the previous two). These alterations may be located at the margin of the lesion (marginal spot), above the lesion (overlying spot), or at a distance from the lesion (remote ...

2023年3月6日 · A network of abnormal, leaky blood vessels in the choroid is referred to as a choroidal neovascular membrane (CNVM). It can generally be classified as occult (type 1) or classic (type 2). The difference between the types of CNVM is based on factors such as location and how it presents during fluorescein angiography.

2008年8月25日 · Based on the time of appearance of leakage and the intensity of leakage, CNV has been divided into two main categories: classic and occult. Each CNV type is evaluated for presence, proximity to the center of the macula and area involved (estimated by using appropriate grids or digital planimetry tools).

Choroidal neovascular membrane (CNVM) is an ingrowth of new vessels from the choriocapillaris through a break in the outer aspect of Bruch’s membrane into the sub-pigment epithelial space. These new vessels are accompanied by fibroblasts, resulting in a fibrovascular complex that proliferates within the inner aspect of Bruch’s membrane.

2020年2月13日 · There are three types of choroidal neovascularization (CNV) classified based on their level of origin: Type 1 originates from the choriocapillaris and grows through Bruch's membrane into the sub-RPE space. Type 2 originates between the RPE and retina. Type 3 develops from the deep retinal capillary plexus and grows downward toward the RPE.

The CNVM appears as greyish subretinal lesion (Fig. 1) with hyperpigmented borders. Other features seen in pathological myopia include: peripapillary crescent; attenuation and absence of retinal pigment epithelium; tilting and temporal flattening of the disc; posterior staphyloma; areas of chorioretinal atrophy; lacquer cracks seen as linear ...

CNV was classified as type 1, minimally type 2, or predominantly type 2 based on fluorescein angiography (FA) and OCT. Two masked retina specialists independently classified CNV using cross-sectional conventional OCTA and PR-OCTA. A total of 17 eyes were enrolled in this study.

2023年5月21日 · Types of CNVM on OCT based on its location: CNVMs can be identified at four levels on OCT: Type 1 – Below the RPE (sub-RPE) Type 2 – Above the RPE in neurosensory space (sub-retinal) Type 2M – Mixed patterns present both in the sub-RPE and subretinal spaces. Type 3 – Neovascularisation present arising from the retinal capillaries. 4.