B-scan ultrasonography of a 45-year-old diabetic with dense vitreous haemorrhage shows a highly reflective, mobile membrane attached at the optic disc extending to the periphery. The MOST likely finding is:

• A Posterior vitreous detachment
• B Total rhegmatogenous retinal detachment
• C Tractional retinal detachment from proliferative diabetic retinopathy ✓
• D Choroidal detachment

Explanation

In proliferative diabetic retinopathy, fibrovascular proliferations contract and detach the retina in a tractional pattern; on B-scan, the detached retina appears as a highly reflective, relatively rigid membrane (less mobile than rhegmatogenous RD) anchored at the disc and major arcades. Posterior vitreous detachment shows a more mobile, less reflective membrane. Rhegmatogenous RD has a more mobile, funnel-shaped or undulating appearance extending to the ora. Choroidal detachment appears as dome-shaped, peripherally located high-reflective masses stopping at the vortex vein ampullae.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.