Figure 3From: Primary pleural angiosarcoma as a mimicker of mesothelioma: a case reportImmunohistochemical stains. Diffuse CD31 positivity (A) indicates the vascular nature of the tumor cells. Diffuse immunoreactivity for cytokeratin stain (B) could be a diagnostic pitfall. (×400 [A] and ×200 [B]).Back to article page