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KMID : 1151620200050010044
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Journal of Retina
2020 Volume.5 No. 1 p.44 ~ p.51
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Optical Coherence Tomography Angiography Features of Idiopathic Macular Telangiectasia Type 2 and Macular Branch Retinal Vein Occlusion
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Ahn Ja-Young
Sohn Joon-Hong
Kong Min-Gui
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Abstract
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Purpose: To evaluate the vascular features of patients with idiopathic macular telangiectasia type 2 (MacTel 2) and macular branch retinal vein occlusion (BRVO) through optical coherence tomography angiography (OCTA).
Methods: Medical records of patients who were initially diagnosed with MacTel 2 (8 eyes of 8 patients) and macular BRVO (8 eyes of 8 patients) were retrospectively reviewed. Foveal avascular zone (FAZ) area and vascular density of OCTA were analyzed by dividing the region into superficial capillary plexus (SCP) and deep capillary plexus (DCP).
Results: Comparison between the patients with MacTel 2 and macular BRVO revealed that there was no significant difference of SCP FAZ area (0.44 ± 0.11 mm2 and 0.37 ± 0.11 mm2, respectively) and DCP FAZ area (0.55 ± 0.22 mm2 and 0.66 ± 0.45 mm2, respectively). There was no significant difference in the vascular density of the SCP between the two groups. The nasal and inferior sector vascular density of DCP in patients with macular BRVO (26.05 ± 12.18 and 23.64 ± 10.34, respectively) was significantly lower than that in patients with MacTel 2 (44.49 ± 8.97 and 36.43 ± 6.67, respectively) (p = 0.009, p = 0.027, respectively). The SCP and the DCP vascular density in patients with macular BRVO showed a significant negative correlation with logarithm of the minimum angle of resolution (logMAR) best corrected visual acuity (BCVA) (p = 0.013, p = 0.043, respectively).
Conclusions: Vascular density of the nasal and inferior sector of the DCP was significantly lower in patients with macular BRVO, and the BCVA in patients with macular BRVO deteriorated when the vascular density decreased.
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KEYWORD
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Foveal avascular zone, Idiopathic macular telangiectasia type 2, Macular branch retinal vein occlusion, Optical coherence tomography angiography, Vascular density
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