The American Society of Dermatopathology


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Interactive Case Study - September 2019

32-year-old woman with a red papule on the abdomen

Jina Chung, MD; Jisun Cha, MD


Question 1:

A 32-year-old woman presented with a six-week history of a dark red papule on her abdomen; it was asymptomatic and had not changed in size or color since its appearance. Clinical exam showed an 8 x 5 mm soft, well-circumscribed, non-blanchable, homogenous red papule on the right upper abdomen. 

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Figure 1.

 
Figure 2.

 
Figure 3.

 
Figure 4.


Figure 5. 


Figure 6. CD31

 
Figure 7. Smooth muscle actin

 
Figure 8. D2-40

 
Figure 9. HHV8

Which of the following is the best diagnosis?