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  Indian J Med Microbiol
 

Figure 4: (a) Photomicrograph shows the presence of arteries (Elastica van Gieson, ×40). (b) The abnormal thickened vessel walls due to deposition of collagen fibers (Masson Trichrome, ×40). (c) The endothelial cells in the abnormal vessels were stained by immunohistochemistry CD31 (×40). (d) Positive immunostaining with SMA, a marker for smooth muscle cells (×40). Positive SMA and CD31 are indications that the vessels are in fact veins and arteries. (e) Negative immunostaining with D2-40, a marker for lymphatic endothelium (×40), further proves that the lesions are vascular in origin

Figure 4: (a) Photomicrograph shows the presence of arteries (Elastica van Gieson, ×40). (b) The abnormal thickened vessel walls due to deposition of collagen fibers (Masson Trichrome, ×40). (c) The endothelial cells in the abnormal vessels were stained by immunohistochemistry CD31 (×40). (d) Positive immunostaining with SMA, a marker for smooth muscle cells (×40). Positive SMA and CD31 are indications that the vessels are in fact veins and arteries. (e) Negative immunostaining with D2-40, a marker for lymphatic endothelium (×40), further proves that the lesions are vascular in origin