PMC3271839_01
A skin-colored nodule with surgery scar, teleangiectasia and purpura on the scalp.
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F1
On her first visit, physical examination revealed a skin-colored nodule with a surgery scar, teleangiectasia and purpura on her scalp (fig. 1).
Irregular anastomosing vascular channel lined by a single layer of enlarged endothelial cells between collagen bundles with dense infiltration of lymphocytes. (a x50; b x200; original magnification).
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F2
Histologically, irregular anastomosing vascular channels lined by single layers of enlarged endothelial cells existed between collagen bundles with dense infiltration of lymphocytes (fig. 2).
Enlarged endothelial-like cells and tumor stromas were positive for MMP-9. (x200; original magnification).
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F3
Moreover, these enlarged endothelial-like cells and tumor stromas were positive for MMP-9 (fig. 3) and negative for MMP-2 (data not shown).