Yohei Takahashi1, Hideki Koizumi2,3, Taiji Hasegawa1, Takahiko Izumi1, Ichiro Maruko1, Shozo Sonoda4, Taiji Sakamoto4, Tomohiro Iida1. 1. Department of Ophthalmology, Tokyo Women's Medical University, Tokyo, Japan. 2. Department of Ophthalmology, Tokyo Women's Medical University, Tokyo, Japan. hkoizumi@med.u-ryukyu.ac.jp. 3. Department of Ophthalmology, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nakagami-gun, Nishihara-cho, Okinawa, 903-0125, Japan. hkoizumi@med.u-ryukyu.ac.jp. 4. Department of Ophthalmology, Kagoshima University, Kagoshima, Japan.
Abstract
PURPOSE: To evaluate and compare the intrachoroidal structures of eyes with typical neovascular age-related macular degeneration (AMD) with those of eyes with polypoidal choroidal vasculopathy (PCV). STUDY DESIGN: Retrospective and comparative case series. METHODS: Eighty-four treatment-naïve eyes of 84 patients (22 women and 62 men) with typical neovascular AMD or PCV located in the subfoveal region were studied. Cross-sectional images of the retina and choroid were obtained by swept-source optical coherence tomography (SS-OCT). The horizontal SS-OCT images were analyzed by a manual delineation technique and by a binarization method. RESULTS: Thirty-nine eyes with typical neovascular AMD and 45 eyes with PCV were studied. Although the subfoveal choroidal thickness (SCT) did not differ significantly between the 2 subtypes (255.1 ± 86.7 µm in typical neovascular AMD and 289.2 ± 116.5 µm in PCV, P = 0.29), the ratio of the large choroidal vessel layer (LCVL) thickness to the SCT was significantly larger in the eyes with PCV than in the eyes with typical neovascular AMD (0.863 ± 0.084 vs 0.803 ± 0.125, P = 0.023). The binarization method did not find significant differences in the choroidal structure between the 2 subtypes. Multivariate logistic regression analyses found the ratio of the LCVL thickness to the SCT to be the only significantly different factor between typical neovascular AMD and PCV (P = 0.035). CONCLUSION: The intrachoroidal structures of typical neovascular AMD and PCV eyes differ significantly. In eyes with PCV, there seemed to be a greater dilation of the large choroidal vessels.
PURPOSE: To evaluate and compare the intrachoroidal structures of eyes with typical neovascular age-related macular degeneration (AMD) with those of eyes with polypoidal choroidal vasculopathy (PCV). STUDY DESIGN: Retrospective and comparative case series. METHODS: Eighty-four treatment-naïve eyes of 84 patients (22 women and 62 men) with typical neovascular AMD or PCV located in the subfoveal region were studied. Cross-sectional images of the retina and choroid were obtained by swept-source optical coherence tomography (SS-OCT). The horizontal SS-OCT images were analyzed by a manual delineation technique and by a binarization method. RESULTS: Thirty-nine eyes with typical neovascular AMD and 45 eyes with PCV were studied. Although the subfoveal choroidal thickness (SCT) did not differ significantly between the 2 subtypes (255.1 ± 86.7 µm in typical neovascular AMD and 289.2 ± 116.5 µm in PCV, P = 0.29), the ratio of the large choroidal vessel layer (LCVL) thickness to the SCT was significantly larger in the eyes with PCV than in the eyes with typical neovascular AMD (0.863 ± 0.084 vs 0.803 ± 0.125, P = 0.023). The binarization method did not find significant differences in the choroidal structure between the 2 subtypes. Multivariate logistic regression analyses found the ratio of the LCVL thickness to the SCT to be the only significantly different factor between typical neovascular AMD and PCV (P = 0.035). CONCLUSION: The intrachoroidal structures of typical neovascular AMD and PCV eyes differ significantly. In eyes with PCV, there seemed to be a greater dilation of the large choroidal vessels.
Authors: Tien Y Wong; Tien Wong; Usha Chakravarthy; Ronald Klein; Paul Mitchell; Gergana Zlateva; Ronald Buggage; Kyle Fahrbach; Corey Probst; Isabella Sledge Journal: Ophthalmology Date: 2007-08-06 Impact factor: 12.079