Retrospective, single-center case series of 120 eyes of 120 consecutive patients with choroidal
nevi who were evaluated by OCT. Diagnostic imaging was performed with a Zeiss StratusOCT Model 3000 (Carl Zeiss Ophthalmic Systems, Dublin, CA) using scan acquisition protocols of 6 radial lines and
retinal thickness analysis overlying the
nevus.
RESULTS: The mean patient age was 59 years (median, 60 years; range, 14-87 years). The choroidal
nevus was a mean of 5.2 mm in basal dimension and 1.7 mm in thickness and was located a mean of 2.7 mm from the optic disk and 2.5 mm from the foveola. Related
retinal findings by ophthalmoscopic evaluation included overlying retina
edema (3%), subretinal fluid (16%),
retinal thinning (0%), drusen (58%), and retinal pigment epithelium (RPE) detachment (2%). In comparison, related
retinal findings at the site of the
nevus by OCT included overlying retina
edema (15%), subretinal fluid (26%),
retinal thinning (22%), drusen (41%), and RPE detachment (12%). Furthermore, OCT permitted classification of the overlying
retinal edema as focal cystoid (3%), diffuse cystoid (8%), coalescent cystoid (3%), and noncystoid
edema (1%). By OCT, the overlying retina was normal thickness (32%), thinned (22%), or thickened (45%), and photoreceptor loss or attenuation was noted in 51% of cases. Specific OCT findings of the choroidal
nevus were limited to its anterior surface with minimal penetration into the mass. These findings included increased thickness of the RPE/choriocapillaris layer (68%) and optical qualities within the anterior portion of the
nevus of hyporeflectivity (62%), isoreflectivity (29%), and hyperreflectivity (9%). Hyporeflectivity was observed in 68% of
pigmented nevi and 18% of nonpigmented
nevi. When comparing OCT with clinical examination, OCT was more sensitive in the detection of related
retinal edema, subretinal fluid,
retinal thinning, photoreceptor attenuation, and RPE detachment.
CONCLUSIONS: