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John S. Barbieri on Muck Rack

John S. Barbieri

As seen in: Wiley Online Library, ScienceDirect, JAMA (The Journal of the American Medical Association), JAMA Dermatology, JAMA Network, Medscape, Healio, Healio Dermatology, HCP Live, MDedge Dermatology and
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Articles

Q&A: Treating back-to-school acne with John Barbieri, MD

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By Gabrielle M. Grasso Verified, John S. Barbieri
| Healio Dermatology Verified
August 17, 2026 7 min read Add topic to email alerts Receive an email when new articles are posted on Please provide your email address to receive an email when new articles are posted on . You've successfully added to your alerts. You will receive an email when new content is published. Click Here to Manage Email Alerts You've successfully added to your alerts. You will receive an email when new content is published. Click Here to Manage Email Alerts We were unable to process your request.
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Skill Checkup: A 42-Year-Old Woman With Warm, Burning Erythematous Patches on Palms That Developed into Yellow Pustules

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By John S. Barbieri
| Medscape Verified
A 42-year-old White woman in the US presents to her dermatologist reporting a 4-week history of warm, tender, erythematous patches on both palms that have recently developed into 2- to 10-mm yellow pustules at varying stages of evolution, with some of the lesions having transformed into brown macules. The patient reports that the lesions are accompanied by a burning sensation and pruritus. The patches are symmetric and involve the thenar and hypothenar eminences and central palms.
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Fast Five Quiz: Presentation and Diagnosis of Psoriasis

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By John S. Barbieri
| Medscape Verified
Understanding how psoriasis typically presents can help distinguish its variants from mimicking conditions. Accurate clinical diagnosis of psoriasis guides appropriate treatment, avoids unnecessary testing, and helps identify patients at risk for systemic comorbidities. Plaque psoriasis characteristically presents as well-demarcated erythematous plaques with a silvery-white scale on typical extensor sites, such as elbows and knees.
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