Micro & Immunology · single question
Oral lichen planus is classified as which type of hypersensitivity reaction?
Show answer and explanation
Correct answer: D. Type IV
- A. Type I is IgE-mediated immediate allergy.
- B. Type II is antibody-mediated cytotoxicity.
- C. Type III is immune-complex mediated.
- D. Correct. Lichen planus is a Type IV (delayed, T-cell-mediated) reaction in which T lymphocytes attack basal keratinocytes; clinically shows Wickham striae, histologically Civatte bodies; treated with topical corticosteroids (e.g., clobetasol).
Practice Micro & Immunology questions Micro & Immunology study notes