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

<div>An undifferentiated carcinoma focus in mucinous tumor. (a) An infiltration of pleomorphic spindle-shaped cells beneath a mucinous borderline lining (H&amp;E stain: ×100). (b) Diffuse immunoexpression of cytokeratin (cytokeratin [AE1/AE3] immunostain: ×100).</div>

Case Reports in Pathology

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Figure 3: Angiosarcoma Arising in Ovarian Mucinous Tumor: A Challenge in Intraoperative Frozen Section Diagnosis 