High-resolution spectral domain optical coherence tomography findings in multifocal vitelliform macular dystrophy

We describe the abnormalities seen in the mid periphery and posterior pole of two patients with multifocal vitelliform macular dystrophy as evaluated by high-definition spectral domain optical coherence tomography (HD-OCT). In patient 1, HD-OCT scans revealed, in the central area, a thicker and more reflective layer compared with the normal macula, located between the retinal pigment epithelium and the interface of the inner segment/outer segment, corresponding to the Verhoeff's membrane. Moreover, HD-OCT macular scans, as well as C-scans, revealed a slight hyper-reflective lesion just above an area of reduced reflectivity between the photoreceptor layer (interface of the inner segment and outer segment) and the Verhoeff's membrane. In patient 2, on HD-OCT macular scans, the layer corresponding to the interface of inner segment and outer segment of the photoreceptor, and the Verhoeff's membrane, appeared disrupted, whereas the retinal pigment epithelium layer appeared preserved. On the other hand, in both patient 1 and 2, the clinically evident vitelliform lesions outside the macular area appeared on HD-OCT scans either as small focal hyper-reflective lesions at the level of the retinal pigment epithelium/photoreceptor complex, either as a more pronounced diffuse thickening of the retinal pigment epithelium/photoreceptor complex, facing the deposition of lipofuscin reported on the histopathologic examination. These new findings would help in a further understanding of multifocal vitelliform macular dystrophy.