Pseudomesotheliomatous epithelioid

Rare neoplasms composed of endothelial cells resembling epithelial mesotheliomas are referred to as pseudomesotheliomatous epithelioid hemangioendothelioma or as epithelioid hemangioendothelioma mimicking... [Pg.442]

FIGURE 12.57 This pseudomesotheliomatous epithelioid hemangioendothelioma was initially diagnosed as an adenocarcinoma and then as an epithelial mesothelioma. In this case, the neoplastic cells expressed keratin and endothelial cell markers CD31, factor VIII antigen, and vimentin. X 400. [Pg.443]

FIGURE 12.58 Ultrastructurally, this pseudomesotheliomatous epithelioid hemangioendothelioma contained Weibel-Palade bodies in many of the neoplastic cells. X 42,000. [Pg.443]

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