Abstract
To evaluate the imaging features of choroidal metastasis using enhanced depth imaging optical coherence tomography (EDI-OCT). Enhanced depth imaging optical coherence tomography imaging features of 24 choroidal metastatic tumors with <2.5 mm of thickness on ultrasonography were retrospectively evaluated. Of the 24 tumors, 10 (42%) were located at the macula and 14 (58%) between the macula and equator. Tumor was plateau-shaped in 18 (75%) tumors and dome-shaped in 6 (25%) tumors. On EDI-OCT, choroidal metastasis showed low internal optical reflectivity in 17 (71%) tumors and high internal reflectivity in 7 (29%) tumors. Most common associated features were overlying choriocapillaris thinning in 24 (100%) tumors, shaggy or irregular, elongated photoreceptors in 18 (75%) tumors, subretinal fluid with high-reflective speckles in 16 (67%) tumors, and thickening of retinal pigment epithelium in 9 (37%) tumors. The mean tumor thickness was 854 μm (range, 287-1500 μm) on EDI-OCT and 2064 μm (range, 0-2400 μm) on ultrasonography. After treatment, the mean decrease in tumor thickness was 520 μm (range, 134-917 μm) on EDI-OCT and 714 μm (range, 0-1500 μm) on ultrasonography. Internal optical reflectivity changed from low to high in five t...Continue Reading
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