A 42-year-old woman presents with deep ocular pain and mild vitritis. B-scan ultrasonography shows diffuse thickening of the posterior sclera with fluid in Tenon's space extending around the optic nerve. The characteristic appearance formed is called:

• A T-sign ✓
• B Double ring sign
• C Cotton ball sign
• D Spot sign

Explanation

Posterior scleritis produces thickened sclera with fluid in the episcleral space of Tenon, which tracks along the optic nerve and forms the characteristic T-sign on B-scan. The double ring sign refers to serous detachment of the neurosensory retina with detached RPE seen on OCT in central serous chorioretinopathy. Recognition of the T-sign matters clinically because posterior scleritis is frequently misdiagnosed and treated as orbital cellulitis or uveitis.

Reference: Kanski's Clinical Ophthalmology, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.