Derma Case: 18-year-old Woman with an Intensely Pruritic Rash

00:02 All right. Next up, we're going to talk about atopic, contact, and seborrheic dermatitis. Let's jump into our case.

00:10 We have an 18-year-old English major with a history of "dermatitis." Presents today to talk about an intensely pruritic rash in the antecubital fossae of both arms.

00:20 She also has a history of allergic rhinitis, mild asthma, seasonal allergies -- typical atopic history. No fevers, no chills, no dyspnea.

00:30 Social and family history, she's a non-smoker, her mother has asthma, her brother is allergic to "everything." Again, sounds like a atopic history both amongst herself and her family members.

00:41 Review of systems is negative. And then on skin exam, you see dry, lichenified, erythematous plaques with scattered papules and excoriations in the antecubital fossae. There's a good picture of it there on the right.

00:55 So which of the following is the most likely diagnosis? Right off the bat, I know we're all thinking about atopic dermatitis, but let's methodically go through each one of the things on this list to make sure that we don't forget to look at those other ones.