Lectures

Erythema Multiforme

by Carlo Raj, MD
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    Here, we’ll take a look at erythema multiforme. As we walk through this, you’ve heard of the term erythema quite a bit, and it would be in your best interest to, every once in a while, just come back and make sure that you’re extremely aware of some of the important erythemas that you must know for your boards and wards. Erythema nodosum, erythema multiforme, which is our topic here, erythema migrans or erythema migran chronicum, your target lesion. And then you have your erythema marginatum. That might be part of your Jones criteria for? Good, rheumatic fever. Repeat what I just said. Make sure you know those four in and out. Our topic here, erythema multiforme. Where are you going to find these lesions and what are they? Allow the name to speak to you. You’re going to find multiple concentric erythematous rings. Where and how and why? Let’s take a look. It can be a reaction to infection or medication. Infection, let me give you one. Multiforme, M, multiforme, M, what’s the most common cause of atypical pneumonia? Mycoplasma pneumonia, as an example of an infection, then resulting in a trigger or being a trigger for erythema multiforme, or usual suspect for medications include antibiotics such as sulfonamides. Let’s continue. Is this going to kill you? Thank goodness no. Erythema multiforme minor is highly associated with HSV infection, herpes simplex virus. It usually involves the hands and the feet, dusky plaques. Now, you get into more serious condition. Minor is not going to kill you, luckily. However, you'll notice this and you’re definitely worried about, maybe perhaps, major. Another name for erythema multiforme, EM major, is Stevens-Johnson syndrome. Oh, boy. So, this is the story that you want to take with you, or the spectrum on this slide...

    About the Lecture

    The lecture Erythema Multiforme by Carlo Raj, MD is from the course Inflammatory Skin Diseases. It contains the following chapters:

    • Erythema Multiforme
    • Drugs That Cause SJS/TEN

    Included Quiz Questions

    1. Rheumatic fever
    2. Sarcoidosis
    3. HSV
    4. Lyme disease
    5. Streptococcal infection
    1. Stevens Johnson syndrome (EM major)
    2. Erythema multiforme minor
    3. Toxic epidermal necrolysis
    4. Erythema marginatum
    5. Erythema nodosum
    1. HSV
    2. HPV
    3. HIV
    4. Hepatitis B
    5. Hepatitis C
    1. Fluids, supportive care and IVIG
    2. Self resolving
    3. Start on prophylactic antibiotics
    4. Apply sulfa cream to the affected areas
    5. Topical steroids only

    Author of lecture Erythema Multiforme

     Carlo Raj, MD

    Carlo Raj, MD


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