Ji Eun Lee1, Min Kyu Shin1, In Young Chung2, Joo Eun Lee3, Hyun Woong Kim4, Sang Joon Lee5, Sung Who Park1, Ik Soo Byon6. 1. Department of Ophthalmology, College of Medicine, Pusan National University, Yangsan, Republic of Korea Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea. 2. Department of Ophthalmology, Gyeongsang National University, JinJu, Republic of Korea. 3. Department of Ophthalmology, Haeundae Paik Hospital, College of Medicine, Inje University, Busan, Republic of Korea. 4. Department of Ophthalmology, Busan Paik Hospital, College of Medicine, Inje University, Busan, Republic of Korea. 5. Department of Ophthalmology, Gospel hospital, College of Medicine, Kosin University, Busan, Republic of Korea Institute for medicine, Kosin University, Busan, Republic of Korea. 6. Department of Ophthalmology, College of Medicine, Pusan National University, Yangsan, Republic of Korea Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
Abstract
AIMS: To investigate the relationship between idiopathic choroidal neovascularisation (CNV) and choroidal watershed zones (CWZs) using indocyanine green angiography (ICGA). DESIGN: Multicentre, retrospective, interventional case series. METHODS: The medical records and ICGA findings of 44 patients (44 eyes) diagnosed with idiopathic CNV were reviewed. CWZs, defined as hypofluorescence that disappeared during the early phase of ICGA, were classified, and the findings were compared with those of a control group of 30 eyes. The topographical relationship between CWZs and CNV was evaluated. Visual acuity and recurrence were analysed according to the CWZ classification. RESULTS: The CNV lesion was subfoveal in 16 eyes, juxtafoveal in 12 eyes and extrafoveal in 16 eyes. The most common types of CWZs were stellate (23 eyes, 52.3%) and vertical (19 eyes, 43.2%). CWZs involving the fovea were seen in more patients with idiopathic CNV (37 eyes, 84.1%) than in the control group (11 eyes, 36.7%, p<0.001). The topographical relationship between CWZs and CNV was determined in 42 eyes (95.5%), with the CNV located within the CWZ in 39 eyes and at the margin in 3 eyes. Extrafoveal CNV was within the CWZ in all 16 affected eyes. At 6 months, visual acuity was significantly worse in patients with subfoveal CNV (p=0.028) or stellate CWZs (p=0.039). CONCLUSIONS: The findings of a CWZ were related to the location and functional outcome of idiopathic CNV. Our results suggest that choroidal circulation is a predisposing factor for the development of CNV in young patients. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/
AIMS: To investigate the relationship between idiopathic choroidal neovascularisation (CNV) and choroidal watershed zones (CWZs) using indocyanine green angiography (ICGA). DESIGN: Multicentre, retrospective, interventional case series. METHODS: The medical records and ICGA findings of 44 patients (44 eyes) diagnosed with idiopathic CNV were reviewed. CWZs, defined as hypofluorescence that disappeared during the early phase of ICGA, were classified, and the findings were compared with those of a control group of 30 eyes. The topographical relationship between CWZs and CNV was evaluated. Visual acuity and recurrence were analysed according to the CWZ classification. RESULTS: The CNV lesion was subfoveal in 16 eyes, juxtafoveal in 12 eyes and extrafoveal in 16 eyes. The most common types of CWZs were stellate (23 eyes, 52.3%) and vertical (19 eyes, 43.2%). CWZs involving the fovea were seen in more patients with idiopathic CNV (37 eyes, 84.1%) than in the control group (11 eyes, 36.7%, p<0.001). The topographical relationship between CWZs and CNV was determined in 42 eyes (95.5%), with the CNV located within the CWZ in 39 eyes and at the margin in 3 eyes. Extrafoveal CNV was within the CWZ in all 16 affected eyes. At 6 months, visual acuity was significantly worse in patients with subfoveal CNV (p=0.028) or stellate CWZs (p=0.039). CONCLUSIONS: The findings of a CWZ were related to the location and functional outcome of idiopathic CNV. Our results suggest that choroidal circulation is a predisposing factor for the development of CNV in young patients. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/
Authors: Ji Eun Lee; Ki Su Ahn; Keun Heung Park; Kang Yeun Pak; Hak Jin Kim; Ik Soo Byon; Sung Who Park Journal: Sci Rep Date: 2017-05-30 Impact factor: 4.379