FIGURE 7.

Immunohistochemical features of intracranial mesenchymal tumors with FET‐CREB fusion. These tumors were uniformly positive for desmin expression, which ranged from diffuse strong labeling to cases with focal clusters of positive cells only. Most tumors were also positive for EMA and CD99 expression in a membranous distribution. A subset of tumors demonstrated positivity for synaptophysin that ranged from diffuse strong to more focal and weak staining. These tumors were uniformly negative for SSTR2A, GFAP, and HMB45. Most tumors were negative for cytokeratin expression, with only a single tumor that demonstrated focal positivity for cytokeratin AE1/AE3 (not shown)