skip to main content

Bullous pemphigoid — RACP Written MCQ

Instant feedback + full explanation. One question, done properly.

ModerateDermatology, GeriatricsBullous pemphigoidRACP Written

An 83-year-old man with dementia develops tense itchy blisters on his trunk and limbs. Nikolsky sign is negative. Biopsy shows a subepidermal blister and direct immunofluorescence shows linear IgG and C3 at the basement membrane. What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — Bullous pemphigoid

Tense bullae in an older person with subepidermal blistering and linear basement membrane IgG/C3 are typical of bullous pemphigoid.

Reference: RACP Divisional Written Examination blueprint; Australian Therapeutic Guidelines/AMH principles