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Liver biopsy showing (A) photomicrograph of moderate to poorly differentiated angiosarcoma with dense clumps of plump and spindle shaped, anaplastic cells focally showing slit-like vascular lumens (original magnification, × 200); (B) entrapped hepatocytes (arrows) within the tumor (original magnification, × 400); (C) immunohistochemical staining for the endothelial marker CD34 demonstrating the endothelial origin of the neoplastic cells.
