Fig. 2

A) H&E stain of resected tumor showing oval to round bland nuclei with occasional nuclear pseudoinclusions arranged in whorls and fascicles. B) Immunohistochemical staining showing positive expression of somatostatin receptor 2a. C) pERK stain showing positive staining in a large subset of our patient’s tumor cells. D) Negative control pERK stain showing negative staining in a comparative WHO grade 1 meningioma. E) Immunohistochemical staining showing positive expression of progesterone receptor (PR). All photomicrographs taken at 200x magnification