High-definition optical coherence tomography features in vitelliform macular dystrophy

Area of Science:

• Ophthalmology
• Medical Imaging
• Retinal Diseases

Background:

• Vitelliform macular dystrophy (VMD) is a group of inherited retinal diseases characterized by the accumulation of lipofuscin-like material in the macula.
• Understanding the structural changes in VMD is crucial for diagnosis and monitoring disease progression.

Purpose of the Study:

• To correlate high-definition optical coherence tomography (HD OCT) findings with fundus examination in various stages of VMD.
• To determine the precise anatomic location of vitelliform material using HD OCT.

Main Methods:

• A prospective, observational case series involving 11 consecutive patients diagnosed with VMD.
• Complete ophthalmologic examinations including fundus biomicroscopy and HD OCT were performed.

Main Results:

• HD OCT identified previtelliform lesions as a thickened layer between the retinal pigment epithelium (RPE) and the inner segment/outer segment (IS/OS) interface.
• Vitelliform material appeared as a highly reflective lesion between the outer nuclear layer and RPE in progressive stages.
• Vision impairment correlated significantly with IS/OS interface disruption and advanced disease stages.

Conclusions:

• Early VMD changes involve the RPE-IS/OS interface with material accumulation beneath the sensory retina.
• Progressive stages show disruption and attenuation of the IS/OS, followed by RPE hypertrophy, disruption, and attenuation in late stages.