Pathology · single question
A biopsy of an oral lesion shows separation of epithelial cells from the basement membrane (a subepithelial split). This pattern, classically seen in mucous membrane pemphigoid, warrants referral to which healthcare provider due to a major associated complication risk?
Show answer and explanation
Correct answer: A. Ophthalmologist (due to the risk of ocular cicatricial pemphigoid causing scarring, symblepharon, and potential blindness if untreated)
Separation at the basement membrane zone (rather than within the epithelium itself, as in pemphigus vulgaris) is the classic histologic finding in mucous membrane pemphigoid. This condition carries a significant risk of ocular involvement (ocular cicatricial pemphigoid), which can progress to scarring, symblepharon formation, and blindness if not identified and managed early — making prompt ophthalmologic referral essential.