Friday Pop Quiz 12/19/2025
What immunohistochemical stain is most likely to be positive in this condition?
A. HPV
B. HHV-8
C. PAS
D. S100
E. CD207
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What immunohistochemical stain is most likely to be positive in this condition?
A. HPV
B. HHV-8
C. PAS
D. S100
E. CD207
To find out the correct answer and read the explanation, click here.
Brought to you by our brand partner
*Brand partners had no involvement in the content of the questions or answers. … 
Histologically, this lesion shows plump, polygonal cells arranged in nests and fascicles with granular cytoplasm. Which immunohistochemical stain would be positive?
A. CD31
B. Synaptophysin
C. Factor XIIIa
D. S-100
E. CD34
To find out the correct answer and read the explanation, click here.
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… 
If positive, which immunohistochemical stain supports further evaluation with colonoscopy and cystoscopy?
A. CK20
B. Congo Red
C. S100
D. CD34
E. Neuron specific enolase
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