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Figure 1: Photomicrographs show features of a high-grade angiosarcoma. (a) The tumor cells are spindle in shape and arranged in short fascicles (H and E, ×40). (b) High power photomicrographs show pleomorphism and ill-defined vascular spaces (H and E, ×100). (c) (H and E, ×200). (d) Tumor cells are immunopositive for CD31 (IHC: CD31, ×200)

Figure 1: Photomicrographs show features of a high-grade angiosarcoma. (a) The tumor cells are spindle in shape and arranged in short fascicles (H and E, ×40). (b) High power photomicrographs show pleomorphism and ill-defined vascular spaces (H and E, ×100). (c) (H and E, ×200). (d) Tumor cells are immunopositive for CD31 (IHC: CD31, ×200)