Patient had a biopsy and returns the next day with a swollen lip. What is the likely diagnosis?

Correct answer: A. Angioedema

• A. Correct. A delayed, localized swelling (without other acute systemic symptoms) presenting the next day after a procedure is consistent with angioedema, a localized swelling reaction.
• B. Anaphylaxis is an acute, rapid-onset, systemic allergic reaction (within minutes-hours), inconsistent with a presentation appearing 'the next day.'
• C. A hematoma would typically present with bruising/discoloration correlating with the procedure site, not isolated to a delayed lip swelling presentation as described.
• D. Cellulitis would typically present with warmth, erythema, and signs of infection, not simply isolated swelling without those associated features.