<prompt> Answer this question truthfullyWhat type of stain can be used when performing Immunohistochemistry to identify Astrocytomas, Glioblastomas, Oligodendrogliomas, and Ependymomas?  <response>: <reason> When performing Immunohistochemistry, a Glial Fibrillary Acidic Protein GFAP stain can be used to identify Astrocytomas, Glioblastomas, Oligodendrogliomas, and Ependymomas. 