Purpose: To report on high-penetrating swept source optical coherence tomography (SS-OCT) imaging and enhanced depth imaging in an eye with presumed retinal pigment epithelial hamartoma .
Methods and patients: A 60-year-old man with presumed retinal pigment epithelial hamartoma underwent complete ophthalmologic examination, including fluorescein angiography, indocyanine green angiography, enhanced depth imaging OCT, and SS-OCT.
Results: In the left eye, there were six darkly pigmented, nodular, circumscribed lesions in the macular area. The margins were well defined and were not associated with changes such as edema, exudation, or hemorrhage. Fluorescein angiography revealed a minimally dilated feeding artery and draining vein in each lesion. Spectral domain OCT demonstrated an elevation of the retina at the site of the lesions with greatly enhanced optical reflectivity of the inner surface and complete shadowing of optical transmission with crisp vertical margins. However, enhanced depth imaging OCT and SS-OCT revealed deeper retinal layer structures in the pigmented lesions. Intraretinal lesions showed superficial involvement and preretinal extension with or without superficial hyporeflective regions.
Conclusion: Enhanced depth imaging OCT and SS-OCT revealed deeper retinal layer structures in the pigmented lesions in a case with presumed retinal pigment epithelial hamartoma. Enhanced depth imaging OCT and SS-OCT are useful for visualization of intraretinal structures in these lesions, leading to further investigation of the origin and development of retinal pigment epithelial hamartoma.