FIGURE 4

Small cell carcinoma (A) demonstrating loss of pRB expression (B) and intact, diffuse p16 expression (C). Note the intact labeling of endothelial cells for pRB in Figure 4B.
Small cell carcinoma (A) demonstrating loss of pRB expression (B) and intact, diffuse p16 expression (C). Note the intact labeling of endothelial cells for pRB in Figure 4B.