CASE REPORTS
JOURNAL ARTICLE
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Assessment of choroidal osteoma complicating choroidal neovascularization by optical coherence tomography angiography.

PURPOSE: Choroidal osteoma (CO) frequently leads to progressive visual loss due to complications of secondary choroidal neovascularization (CNV).We report herein the function of optical coherence tomography angiography (OCTA) in observation of CO complicating CNV.

METHODS: A 25-year-old female presented to our hospital with chief complaint of sudden unilateral visual acuity decrease for one week, with metamorphopsia in the left eye. Her best corrected visual acuity was 0.12 in the left eye. Then complete ophthalmological examinations including fundus photography, B-scan ultrasound, fundus fluorescent angiography, and spectral-domain optical coherence tomography (SD-OCT) were performed. She was diagnosed as CO on the basis of these results. But the diagnosis could not explain the sudden visual loss and submacular hyperreflective lesion by SD-OCT. Furthermore, she underwent OCTA and indocyanine green angiography.

RESULTS: A diagnosis of classic juxtafoveal CNV secondary to CO was made eventually. Then she was treated with an intravitreous injection of ranibizumab twice. The visual acuity got better and better during the treatment, and the efficacy was stable, giving rise to both subjective and anatomic improvement.

CONCLUSIONS: Optical coherence tomography angiography has the advantage of varying the segmentation and scrolling through the different retinal layers, and layer-specific observation of blood flow in each layer. In addition, OCTA can measure the vessel area change of CNV and provide a better appreciation of CNV, observing the efficacy more elaboratively and quantizedly. OCTA makes promising noninvasive identification of the CO-related CNV.

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