Interactive Case Study - May 2014

A 63-year-old woman with an enlarging erythematous plaque on the forearm (with zoomable virtual slide)

Peggy Myung, MD, PhD; Jennifer Madison McNiff, MD

Clinical History
A 63-year-old woman presented with an asymptomatic slowly enlarging erythematous thin plaque over her extensor forearm. A biopsy of this lesion shows the following histopathology (Figures 1-3).

Click image to view Zoomable Digital Slide

Figure 1.

Figure 2.

Figure 3.

What is the best diagnosis?

A.	Acquired elastotic hemangioma

B.	Angiosarcoma

C.	Diffuse dermal angiomatosis

D.	Kaposi's sarcoma

E.	Targeted hemosiderotic hemangioma