Interactive Case Study - September 2018

Question 1:

62-year-old Caucasian woman with a 10-year history of erythematous, asymptomatic tan patches on the knee presenting after a knee replacement without progression. Patient has history of rheumatoid arthritis.
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Figure 1.


Figure 2. 10x


Figure 3. 20x A


Figure 4. 20x B


Figure 5. 40x


Figure 6. CD68

 
What is the best diagnosis?
 

A.	Intravascular histiocytosis

B.	Intravascular lymphoma

C.	Kaposi Sarcoma

D.	Livedo reticularis

E.	Reactive angioendotheliomatosis