The American Society of Dermatopathology

View case study archive

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. 

Click this image to view the virtual slide

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?