Friday Pop Quiz 10/9/2026
A 55 year old female presents to the dermatology clinic for follow-up for treatment of prurigo nodularis. There are more than 20 lesions on her arms, legs, and back and the patient reports they continue to be severely itchy, and affects her quality of life and ability to sleep at night. Lab work, including CBC, CMP, HA1c, HIV, hepatitis panel and TSH/free T4 have been normal. She has not respo …
A 55 year old female presents to the dermatology clinic for follow-up for treatment of prurigo nodularis. There are more than 20 lesions on her arms, legs, and back and the patient reports they continue to be severely itchy, and affects her quality of life and ability to sleep at night. Lab work, including CBC, CMP, HA1c, HIV, hepatitis panel and TSH/free T4 have been normal. She has not respo … 
A 26-year-old man with a history of cystic fibrosis initiated a new cystic fibrosis medication two months ago. Approximately one week ago, the patient noticed the abrupt onset of papules on his upper back, as shown, for which he has tried using a benzoyl peroxide wash without improvement. Which of the following is the most appropriate next step?
A. Cessation of cystic fibrosis medication
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Your 25-year-old patient notes a rapid onset of numerous lesions like the one pictured here which spontaneously start to resolve without scarring. There is no involvement of the airway. He notes a family history of similar lesions. What is the likely condition, and what is the inheritance pattern?
A. Ferguson-Smith, AD
B. Ferguson-Smith, AR
C. Ferguson-Smith, XLD
D. Grzbowski, AD
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A 75 year old male patient presents with a sudden eruption of the shown finding (see photo) all throughout his back and chest. What is this finding called and what is the most commonly associated condition?
A. Leser-Trélat sign and gastric adenocarcinoma
B. Sister Mary Joseph nodule and pelvic tumor
C. Necrolytic migratory erythema and glucagonoma
D. Leser-Trélat sign and psorias … 
A 16 year old patient returns to clinic after spending spring break in Miami complaining of separation of his nails from his nail bed. He also has a sunburn. The patient has erythematous comedones and pustules on his cheeks, forehead, chin and upper back [see photo], and was started on treatment for these findings at his last visit. Which of the following most likely caused his nail findings?
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