On spectral-domain OCT, a full-thickness macular hole is identified. Which OCT feature distinguishes a full-thickness macular hole from a pseudohole caused by an epiretinal membrane?
- A Presence of an epiretinal membrane
- B Full-thickness defect in neurosensory retina with a surrounding cuff of subretinal fluid ✓
- C Increased retinal thickness at the fovea
- D Loss of the foveal contour
Correct answer: B. Full-thickness defect in neurosensory retina with a surrounding cuff of subretinal fluid
Explanation
A full-thickness macular hole shows a complete break in the neurosensory retina from internal limiting membrane to photoreceptor layer with a surrounding cuff of subretinal fluid. A pseudohole from an epiretinal membrane has intact retinal layers despite foveal distortion. Epiretinal membrane can be present in both. Increased retinal thickness and loss of foveal contour are nonspecific and seen in pseudoholes.
Reference: Ryan's Retina, 6th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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