Epithelioid Hemangioendothelioma of the Mastoid: Resection for Recurrence and Adjuvant Radiation with 8-Year Followup

Figure 3

Epithelioid hemangioendothelioma involving the mastoid bone ((a) H&E ×40), composed of cords and sheets of epitheloid cells in the background of fibromyxoid stroma ((b) H&E ×100). Neoplastic cells form cytoplasmic vacuoles ((c) H&E ×200) and strongly and diffusely express endothelial markers ((d) CD31 ×100).

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