A 62-year-old diabetic with dense vitreous hemorrhage undergoes B-scan ultrasonography. It shows a shallow, tent-shaped, highly reflective membrane anchored at the optic disc and arcades, with no aftermovement on dynamic scanning and no echolucent gap beneath it. The most likely diagnosis is:

• A Tractional retinal detachment ✓
• B Rhegmatogenous retinal detachment
• C Choroidal detachment
• D Posterior vitreous detachment with vitreous opacities

Explanation

Diabetic fibrovascular proliferation anchors the detached posterior hyaloid and retina at vascular adhesions, producing the characteristic tented or table-top configuration with shallow, immobile elevation and absent aftermovement. A rhegmatogenous detachment is typically convex, more freely mobile, and shows prominent aftermovement on kinetic scan. Choroidal detachments are thick, echolucent, fixed, and extend beyond the ora serrata, sparing the optic disc, which distinguishes them from this disc-anchored membrane.

Reference: Kanski's Clinical Ophthalmology, 9th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.