Intravascular Papillary Endothelial Hyperplasia Associated with Venous Pool Arising in the Lower Lip: A Case Report
Figure 6
The endothelial cells of this lesion were reactive on immunohistochemical staining for alpha-SMA, and alpha-SMA was positive in the single layer of the blood vessel walls (yellow arrows). Thin, expanded smooth muscle cells in the vessel wall (white arrows) were also observed (Original magnification, 16; Bar, 100 micrometer).
