Fig. 3

mIHC image showing the distributions of endothelial cells and smooth muscle cells in three different polyp subtypes. The endothelial cells were stained with a PECAM1 antibody (orange), the smooth muscle cells were stained with an α-SMA antibody (white), and the cell nuclei were stained with DAPI (blue). The red arrow indicates lumen-containing blood vessels, and the yellow arrow indicates smooth muscle fibers. Scale bar, 100 μm