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
To find out the correct answer and read the explanation, click here.
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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. … 
A previously healthy 55-year-old patient presents with a four-month history of the pictured indurated papules and plaques. History does not reveal prior skin problems. The lesions started on the cheeks and are now affecting the forehead. The sun seems to exacerbate the condition, causing mild burning and pruritus. Patient complains of cheek swelling that worsens in the morning and improves as … 
A 7-year-old boy presents with recurrent crops of pink papules on the trunk, buttocks, and proximal extremities, as shown in the clinical image. The lesions ulcerate and heal with varioliform scarring. Which of the following histologic findings would not be expected in this condition?
A. Lichenoid infiltrate
B. Extravasation of red blood cells
C. Dyskeratosis
D. Parakeratosis
E. … 
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 … 
A 38-year-old woman presents with multiple bothersome papules on her nose, as shown. She had previously been seen for these lesions and was treated with benzoyl peroxide wash and oral clindamycin with minimal improvement. Which of the following is the most likely diagnosis?
A. Acne excoriee
B. Atypical mycobacterial infection
C. Foreign body granuloma
D. Hodgkin lymphoma
E. Lup …