SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD; LORI D. PROK, MD
Microscopic examination revealed an increased density of mildly dilated small vascular channels in the upper and mid-dermis (Figure 2). The interstitial dermis demonstrated the presence of fibrohistiocytic cells as well as enlarged multinucleated cells, some with a stellate appearance (Figure 3). The overlying epidermis was acanthotic. Factor XIIIa and CD163 highlighted many stromal cells in the dermis (not shown), including some of the multinucleated cells. Endothelial cells within the vascular channels in the dermis stained positively with CD31 (not shown). CD68 and HHV-8 stains were negative (not shown).
Multiple Asymptomatic Violaceous Macules on the Thigh—Diagnosis. JAMA Dermatol. 2013;149(3):358-363. doi:10.1001/archderm.149.3.358-h