Friday Pop Quiz 8/15/2025
Your patient with extensive actinic damage and many of the lesions seen here is interested in field therapy with a light-based modality. On a cellular level, how does photodynamic therapy kill cells that make up this lesion?
A. Heat shock proteins
B. Inhibition of pyrimidine nucleotide synthesis
C. Neutrophil-mediated, antibody-dependent cellular cytotoxicity
D. Reactive singlet ox …
Your patient with extensive actinic damage and many of the lesions seen here is interested in field therapy with a light-based modality. On a cellular level, how does photodynamic therapy kill cells that make up this lesion?
A. Heat shock proteins
B. Inhibition of pyrimidine nucleotide synthesis
C. Neutrophil-mediated, antibody-dependent cellular cytotoxicity
D. Reactive singlet ox … 
What condition on the eyelids is depicted in the image?
A. Eruptive xanthoma
B. Xanthelasma
C. Plane xanthomas
D. Verruciform xanthomas
E. Tuberous xanthomas
To find out the correct answer and read the explanation, click here.
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A 3-month-old infant presents with the findings seen in the photo in the first week of life. The mother reports the infant was born with a membrane encasing it that later "peeled off". History is also notable for poor weight gain and multiple rounds of antibiotics since birth. On physical exam there is diffuse erythema, scaling, and sparse eyebrow hair. Laboratory studies show eosinophilia (1, … 
Which extracutaneous organ is typically associated with this subtype of sarcoidosis?
A. Heart
B. Lungs
C. Kidneys
D. Eyes
E. Liver
To find out the correct answer and read the explanation, click here.
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*Brand partners had no involvement in the content of the questions or answers. … 
A 45-year-old man presents to the office with weakness and the lesions on his hand pictured. His symptoms have been progressively worsening over the last 5 months. He works as a nurse and has had difficulty walking up the stairs and lifting patients. He has a history of frontal migraines for which he occasionally takes ibuprofen. He takes a cholesterol lowering medication and is otherwise heal … 