Fig. 3From: Epithelioid angiosarcoma arising in schwannoma of the kidney: report of the first case and review of the literature a, b Immunohistochemical staining (×10): neoplastic cells show immunopositivity for CD34 and cytokeratin. c Immunohistochemical staining (×10): schwannoma cells with strong, diffuse S100 immunoreactivity. d Immunohistochemical staining (×40): neoplastic cells present in fine-needle aspiration biopsy of the pulmonary lesion are CD34 positiveBack to article page