Immunohistolochemistry of atypical teratoid rhabdoid tumor (ATRT):
Immunohistochemistry for INI1, the product of the SMARCB1 gene typically defective in ATRT. Note loss of brown staining in the nuclei of tumor cells with defective SMARCB1 as compared to retained staining of nuclei of vascular cells (internal positive control).
by Marvin 101 via wikipedia