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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Hum Pathol. 2011 Dec 1;43(5):650–659. doi: 10.1016/j.humpath.2011.07.006

Fig 5.

Fig 5

Immunohistochemically typical features include positivity for S100 protein and GFAP. Both markers highlight a microtrabecular pattern. Tumor cells are negative for CD34 and SMA; the positive cells represent non-tumor elements: fibroblasts/endothelial cells and smooth muscle cells/pericytes, respectively.