Friday Pop Quiz 7/31/2026
A 29-year-old woman with Fitzpatrick skin type III presents with a history of recurrent erythematous plaques on her forearms after brief sun exposure, especially during the spring and early summer. She reports no systemic symptoms and no photosensitizing medications. Biopsy confirms findings consistent with polymorphous light eruption (PMLE). She wants a sunscreen that will minimize her flares …
A 29-year-old woman with Fitzpatrick skin type III presents with a history of recurrent erythematous plaques on her forearms after brief sun exposure, especially during the spring and early summer. She reports no systemic symptoms and no photosensitizing medications. Biopsy confirms findings consistent with polymorphous light eruption (PMLE). She wants a sunscreen that will minimize her flares … 
Boca Raton, Fla., dermatologist Robyn Siperstein, MD, FAAD, says a layered cake is the perfect analogy for understanding facial structure and the need for combination therapy in rejuvenation. In this Next Steps in Derm interview, in partnership with the ODAC Dermatology Conference, Dr. Siperstein outlines each layer of the face, from bone to skin, and which therapies work best for each layer. Ener … 
Bemotrizinol’s recent FDA approval – the first new approval of a UV filter in more than 20 years -- made headlines in several media outlets, including NPR. The broad-spectrum, chemical sunscreen ingredient is a welcome addition to the U.S. market, according to dermatologists, who have been advocating for its approval for decades. The U.S. lags behind other countries in the number of approved s … 
Tranexamic acid (TXA) is a synthetic lysine derivative that reversibly blocks the lysine-binding site on plasminogen, preventing conversion to plasmin. While originally developed as an antifibrinolytic agent to reduce bleeding, TXA has several downstream effects that make it useful in dermatology, particularly for pigmentary disorders, with emerging evidence in inflammatory disorders as well. TX … 
An infant is referred by their pediatrician for further evaluation of seborrheic dermatitis refractory to standard therapy. What is the most appropriate intervention?
A. Prescribe clobetasol solution
B. Obtain bacterial culture
C. Obtain fungal culture
D. Obtain complete blood count
E. Obtain skin biopsy
To find out the correct answer and read the explanation, click here. …