Angiosarcoma Arising in Ovarian Mucinous Tumor: A Challenge in Intraoperative Frozen Section Diagnosis

Figure 2

Angiosarcoma in mucinous tumor. (a) Dissecting growth of ectatic vascular channels in a septum between mucinous borderline locules (H&E stain: ×10). (b) Endothelial lining with marked nuclear atypia (H&E stain: ×100). (c) Focal endothelial tufting and mitotic activity (inset) (H&E stain: ×400). (d) Diffuse immunoexpression of CD31 (CD31 immunostain: ×40).

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