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Purpose To evaluate the evidence for alterations of blood flow, vascular and perfusion densities in the choroid, macula, peripapillary region, and the area surrounding the optic nerve head (ONH) in patients with thyroid-associated ophthalmopathy (TAO) based on changes of OCTA parameters. Methods A systematic review of Pubmed, Google Scholar, Scopus, WOS, Cochrane, and Embase databases, including quality assessment of published studies, investigating the alterations of OCTA parameters in TAO patients was conducted. The outcomes of interest comprised changes of perfusion and vascular densities in radial peripapillary capillary (RPC), ONH, superficial and deep retinal layers (SRL and DRL), choriocapillaris (CC) flow, and the extent of the foveal avascular zone (FAZ). Results From the total of 1253 articles obtained from the databases, the pool of papers was narrowed down to studies published until March 20th, 2024. Lastly, 42 studies were taken into consideration which contained the data regarding the alterations of OCTA parameters including choriocapillary vascular flow, vascular and perfusion densities of retinal microvasculature, SRL, and DRL, changes in macular all grid sessions, changes of foveal, perifoveal and parafoveal densities, macular whole image vessel density (m-wiVD) and FAZ, in addition to alterations of ONH and RPC whole image vessel densities (onh-wiVD and rpc-wiVD) among TAO patients. The correlation of these parameters with visual field-associated parameters, such as Best-corrected visual acuity (BCVA), Visual field mean defect (VF-MD), axial length (AL), P100 amplitude, and latency, was also evaluated among TAO patients. Conclusion The application of OCTA has proven helpful in distinguishing active and inactive TAO patients, as well as differentiation of patients with or without DON, indicating the potential promising role of some OCTA measures for early detection of TAO with high sensitivity and specificity in addition to preventing the irreversible outcomes of TAO. OCTA assessments have also been applied to evaluate the effectiveness of TAO treatment approaches, including systemic corticosteroid therapy and surgical decompression.
Purpose To evaluate the evidence for alterations of blood flow, vascular and perfusion densities in the choroid, macula, peripapillary region, and the area surrounding the optic nerve head (ONH) in patients with thyroid-associated ophthalmopathy (TAO) based on changes of OCTA parameters. Methods A systematic review of Pubmed, Google Scholar, Scopus, WOS, Cochrane, and Embase databases, including quality assessment of published studies, investigating the alterations of OCTA parameters in TAO patients was conducted. The outcomes of interest comprised changes of perfusion and vascular densities in radial peripapillary capillary (RPC), ONH, superficial and deep retinal layers (SRL and DRL), choriocapillaris (CC) flow, and the extent of the foveal avascular zone (FAZ). Results From the total of 1253 articles obtained from the databases, the pool of papers was narrowed down to studies published until March 20th, 2024. Lastly, 42 studies were taken into consideration which contained the data regarding the alterations of OCTA parameters including choriocapillary vascular flow, vascular and perfusion densities of retinal microvasculature, SRL, and DRL, changes in macular all grid sessions, changes of foveal, perifoveal and parafoveal densities, macular whole image vessel density (m-wiVD) and FAZ, in addition to alterations of ONH and RPC whole image vessel densities (onh-wiVD and rpc-wiVD) among TAO patients. The correlation of these parameters with visual field-associated parameters, such as Best-corrected visual acuity (BCVA), Visual field mean defect (VF-MD), axial length (AL), P100 amplitude, and latency, was also evaluated among TAO patients. Conclusion The application of OCTA has proven helpful in distinguishing active and inactive TAO patients, as well as differentiation of patients with or without DON, indicating the potential promising role of some OCTA measures for early detection of TAO with high sensitivity and specificity in addition to preventing the irreversible outcomes of TAO. OCTA assessments have also been applied to evaluate the effectiveness of TAO treatment approaches, including systemic corticosteroid therapy and surgical decompression.
Purpose: To evaluate the effects of intravenous steroid therapy on the clinical activity score (CAS), exophthalmos, margin-reflex distance 1 (MRD1), and autoantibody levels in patients with thyroid eye disease.Methods: In this retrospective observational study, we enrolled 83 patients diagnosed with thyroid eye disease treated with intravenous steroid therapy. We assessed exophthalmos, MRD1, CAS, thyroid-stimulating antibody (TSAb), and thyroid-stimulating hormone receptor antibody (TSHR Ab) levels at baseline, 6 and 12 weeks after initiating therapy, and 2 months after therapy termination. Additionally, baseline serum selenium levels were examined to determine their impact on treatment efficacy.Results: TSAb, TSHRAb, and CAS levels showed a continuous decline from 443.22 to 341.03 specimen-to-reference control ratio (SRR%), 22.18 to 7.91 IU/L, and 3.37 to 1.88, respectively (<i>p</i> < 0.0001), up to 2 months following therapy termination. Exophthalmos did not show significant changes at any assessed time point up to 2 months after therapy termination. MRD1 decreased until 12 weeks after therapy initiation but showed no significant change 2 months later. No correlation was found between baseline serum selenium levels and changes in exophthalmos, MRD1, TSAb, TSHR Ab, or CAS.Conclusions: Intravenous steroid therapy was effective in reducing TSAb, TSHR Ab, and CAS levels up to 2 months after therapy termination. However, it had limited positive impact on exophthalmos or eyelid retraction. Baseline selenium levels did not correlate with the changes in any of the examined parameters.
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