Primary Renal Angiosarcoma with Extensive Necrosis: A Difficult Diagnosis

Figure 2

Microphotographs of a renal biopsy. (a) Scant tissue fragments with extensive necrosis (HE, ×40). (b) Scant tissue fragments with extensive necrosis (HE, ×100). (c) Multiple vascular channels lined by pleomorphic endothelial cells and increased mitotic figures (arrows) (HE, ×400). (d) Strong immunoreactivity for an endothelial marker CD34 (IHC, ×400).

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