Pathology · single question
A patient has swelling of the lip after removing the rubber dam. What is the diagnosis?
Show answer and explanation
Correct answer: C. Angioedema
- A. Contact dermatitis is a Type IV (delayed) hypersensitivity reaction that occurs 24-72 hours after exposure — not the immediate swelling seen after rubber dam removal.
- B. An abscess develops over hours to days from infection — not immediately after rubber dam removal.
- C. ANGIOEDEMA is the classic reaction to LATEX rubber dam allergy. It presents as sudden, localized swelling of the lip, face, or tongue upon contact with latex. It involves deeper dermal and submucosal swelling. Latex allergy is a Type I (IgE-mediated) immediate hypersensitivity reaction.
- D. A hematoma results from trauma/bleeding — not from rubber dam placement.