Interactive Case Study - December 2018

Question 1:

A 72-year-old male presented with a red papule on the left upper back.
 
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Figure 1. 2x

 
Figure 2. 10x

 
Figure 3. 20x

 
Figure 4. 60x

 
Figure 5. CD68 20x

 
Figure 6. S100 60x



 
Which of the following is the best diagnosis?
 

A.  Cutaneous Hodgkin lymphoma

B.  Cutaneous Rosai-Dorfman disease

C.  Langerhans cell histiocytosis

D.  Solitary reticulohistiocytoma

E.  Xanthogranuloma