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New insights into the pathoanatomy of diabetic macular edema: angiographic patterns and optical coherence tomography

 Byeon, Suk Ho  ;  Chu, Young Kwang  ;  Hong, Young Taek  ;  Kim, Min  ;  Kang, Hae Min  ;  Kwon, Oh Woong 
 Retina- the Journal of Retinal and Vitreous Diseases, Vol.32(6) : 1087-1099, 2012 
Journal Title
 Retina- the Journal of Retinal and Vitreous Diseases 
Issue Date
PURPOSE: To describe the pathoanatomy of diabetic macular edema in optical coherence tomography and its correlation with fluorescein angiography patterns. METHODS: Sixty eyes of 56 patients were analyzed. Diabetic macular edema was classified into typical focal leakage (from microaneurysm), typical diffuse leakage (the capillary plexus), or combined/questionable leakage using fluorescein angiography and retinal thickness profiles. The leakage and pooling patterns in fluorescein angiography were matched to the corresponding optical coherence tomography images and analyzed. RESULTS: Focal leakage shows swelling predominantly in the outer plexiform layer (OPL). Deeply located microaneurysms directly leak into the loose fiber portion of OPL (Henle layer) through the "fluid conductivity barrier" (synaptic portion of OPL). Diffuse leakage caused swelling predominantly in the inner nuclear layer and secondarily in the OPL. The deep capillary plexus is located between the two "fluid barriers" (inner plexiform layer and OPL); thus, diffuse leakage is primarily related with swelling in the inner nuclear layer. In the combined/questionable leakage, partial sections consisting of inner nuclear layer swelling and much larger areas of OPL/outer nuclear layer swelling are noticed. CONCLUSION: Based on the concept of the fluid conductivity barrier, we revealed a correlation between the intraretinal location of the leakage source and where the fluid accumulated within the retinal layers.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실)
Yonsei Authors
강혜민(Kang, Hae Min)
권오웅(Kwon, Oh Woong)
김민(Kim, Min) ORCID logo https://orcid.org/0000-0003-1873-6959
변석호(Byeon, Suk Ho) ORCID logo https://orcid.org/0000-0001-8101-0830
홍영택(Hong, Young Taek)
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