Robert Micheletti, MD, points out key highlights from his lecture, Think Fast! Dermatology Urgencies and Emergencies, at the 6th Annual Elevate-Derm Conference at the JW Marriott Water Street in Tampa, Florida.

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In conversation with Veronica Richardson, DCNP, Dr. Micheletti — Associate Professor of Dermatology and Medicine and Chief of Hospital Dermatology at the University of Pennsylvania — stresses that very few things in dermatology can kill a patient, so clinicians need to identify those early. He focuses on DRESS (drug reaction with eosinophilia and systemic symptoms), describing its reliable clinical clues: a full-body, often deep-red morbilliform eruption, facial swelling, and a patient who "doesn't look happy" because they're febrile and systemically unwell. He emphasizes drug timing — unlike most reactions, DRESS is often triggered by a medication started weeks to a couple months earlier, letting it "fly under the radar" — and names classic bad actors like allopurinol, vancomycin, minocycline, beta-lactams, and antiepileptics such as lamotrigine, phenobarbital, and phenytoin.

Dr. Micheletti walks through workup (CBC with diff, LFTs, basic metabolic panel) and organ-specific associations — allopurinol with renal involvement, minocycline with cardiac DRESS — and reminds providers that these patients only reach the right care area if the derm provider recognizes the danger. He also notes management doesn't end at discharge: DRESS needs a prolonged steroid taper of two to three months to avoid recurrence, and post-DRESS autoimmune sequelae like thyroiditis, type 1 diabetes, and alopecia universalis can emerge out to three to six months. Switching gears, he advises casting a wide net on atypical lesions in immunosuppressed patients, since they may not mount a normal inflammatory response.

  • Suspect DRESS when a full-body, deep-red morbilliform eruption is paired with facial swelling, fever, and a patient who "doesn't look happy" — those red flags separate it from a run-of-the-mill drug rash.
  • Pay attention to drug timing: DRESS is usually triggered by a medication started weeks to a couple months ago (allopurinol, vancomycin, minocycline, beta-lactams, lamotrigine, phenobarbital, phenytoin), not the drug started yesterday.
  • Start with a CBC with diff, LFTs, and basic metabolic panel; remember allopurinol is classic for renal involvement and minocycline for devastating cardiac DRESS.
  • DRESS management doesn't end at discharge — patients need a slow two-to-three-month steroid taper to prevent recurrence, and clinicians should screen for post-DRESS autoimmune sequelae (thyroid studies, hemoglobin A1C) out to three to six months.
  • In immunosuppressed or transplant patients, beware the "too easy" diagnosis: violaceous, necrotic, or pustular lesions warrant biopsy and tissue cultures, and fever may be absent because they can't mount a normal inflammatory response.