Multiple Primary Angiosarcomas of the Colon

Figure 2

(a) All four tumors from the resected colon segment were composed of solid sheets of spindle and epithelioid neoplastic cells (H&E, 100x magnification). (b) At higher magnification, prominent nucleoli and mitotic figures are visible (H&E, 400x magnification). (c) The tumor cells showed strong positive immunohistochemical staining with the endothelial marker CD31 (200x magnification). (d) Staining for ERG confirmed the tumors’ endothelial origin (200x magnification).

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