Friday Pop Quiz 3/13/2026
A 75-year-old man presents with tense bullae as pictured. DIF reveals linear IgG and C3 at the dermal-epidermal junction. On salt-split skin, immunoreactants are localized to the roof of the specimen. What is the target antigen?
A. Type VII Collagen
B. Type XVII collagen (BP180)
C. Laminin 332
D. Desmoglein 1
E. Integrin α6β4
To find out the correct answer and read the expl …
A 75-year-old man presents with tense bullae as pictured. DIF reveals linear IgG and C3 at the dermal-epidermal junction. On salt-split skin, immunoreactants are localized to the roof of the specimen. What is the target antigen?
A. Type VII Collagen
B. Type XVII collagen (BP180)
C. Laminin 332
D. Desmoglein 1
E. Integrin α6β4
To find out the correct answer and read the expl … 
A 55-year-old female presents with concerns about plaques on both of her eyelids. Which of the following statements is true regarding this patient's skin condition?
A. These are the least common type of xanthoma
B. Most commonly associated with hyperglycemia
C. Lesions arise asymmetrically
D. Lesions start off as many bumps that grow rapidly
E. Lesions are soft, velvety, yellowi … 
What is the most common site of extracutaneous involvement in this non-infectious disease?
A. Lungs
B. Eyes
C. Bone Marrow
D. Liver
E. Nasal mucosa
To find out the correct answer and read the explanation, click here.
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Which ocular finding may be seen in a patient with this skin condition?
A. Comma-shaped corneal opacities
B. Retinitis pigmentosa
C. Congenital hypertrophy of the retinal pigmented epithelium
D. Angioid streaks
E. Pingueculae
To find out the correct answer and read the explanation, click here.
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*Brand partners had no involv … 
A 21-year-old pregnant woman complains of a mildly pruritic rash for 17 days. She experienced fever, fatigue, and a stuffy nose 13 days before the onset of the rash. She noticed a red spot on her lower abdomen a few days after her flu-like symptoms. Physical examination reveals the findings pictured on her trunk. She notes mild pruritus of the lesions. Which of the following is true regarding …