You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["AnatomicalEntity"].

Please return the output as a JSON object of the format: {"AnatomicalEntity": ["tumor cells", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Retinal microangiopathies overlying pigment epithelial detachment in age-related macular degeneration.
PURPOSE: To evaluate alterations in the retinal vasculature overlying pigment epithelial detachments (PED) in exudative age-related macular degeneration (ARMD) using indocyanine green and fluorescein angiography. METHODS: Forty-one patients (41 eyes) with a clinical diagnosis of exudative ARMD with PED underwent simultaneous fluorescein and indocyanine green angiography, also under high (10 degrees ) magnification. Vascular abnormalities in the retina were compared between patients with vascularized (n = 34, group 1) and nonvascularized (n = 7, group 2) PED on indocyanine green angiography and correlated with the size of the PED and the presence of serous retinal detachment. RESULTS: In all, 67 vascular abnormalities were found by indocyanine green angiography and only 22 by fluorescein angiography; this finding was statistically significant (P  less than  0.0001). The finding of retinal vasculopathy (32 patients in group 1 and two patients in group 2) was directly correlated with the presence of choroidal neovascularizations (P = 0.002). There was also a direct correlation between the presence of choroidal neovascularization and size of the PED (P = 0.03). The number of retinal vascular findings was not significantly correlated with serous elevation of the retina. CONCLUSIONS: Retinal vasculopathies may be observed in eyes with PED and are detectable by indocyanine green and fluorescein angiography.
{"AnatomicalEntity": ["Vascular", "retinal vasculature", "pigment epithelial", "macular", "serous retinal", "serous", "eyes", "PED", "vascular", "Retinal", "choroidal", "retina", "pigment epithelial detachments", "retinal", "retinal vascular"]}