Figure 7. Right axilla biopsy (hematoxylin-eosin staining, 400×). The section shows a spindle cell neoplasm with subtle vascular proliferation comprised of small slit-like vessels lined by mildly atypical spindle cells. Scattered hemosiderin deposits (dark brown structures, red arrowheads) and a single focus of intracellular hyaline globules (blue arrowhead) are visible. Immunohistochemical stains (not shown) were positive for ERG and HHV-8.