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 … 
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. … 
Which of the following is the most likely diagnosis in this 56-year-old woman with pruritic hair loss for 3 months?
A. Lichen planopilaris
B. Androgenetic alopecia
C. Central centrifugal cicatricial alopecia
D. Discoid lupus erythematosus
E. Folliculitis decalvans
F. Alopecia areata
To find out the correct answer and read the explanation, click here. … 
A 55 year old female presents with the following red-brown nodules on her elbows and similar appearing nodules and plaques on her ankles. She denies recent travel or any new sexual partners. She does note mild arthralgias associated with the rash. She is started on dapsone with some improvement. Which of the following is the best diagnosis?
A. Erythema induratum
B. Erythema elevatum diu … 
Which of the following wavelength and treatment settings are most appropriate for removal of the pictured lesion?
A. 1064 nm; 4 mm spot size, 110 J/cm2 fluence, and 30 ms pulse duration
B. 585 nm; 10 mm spot size, 10 J/cm2 fluence, and 20 ms pulse duration
C. 694 nm; 4 mm spot size, 3 J/cm2 fluence, and 20 ns pulse duration
D. 1064 nm; 10 mm spot size, 10 J/cm2, and 60 ms pulse dur …