IHC for brachyury was reviewed in all cases. IHC for SMARCB1 was performed on 4-µm-whole sections of formalin-fixed, paraffin embedded tissue blocks. The primary antibody used was a mouse monoclonal anti-BAF47 antibody (1:30; BD bioscience, San Jose, CA). Antigen retrieval, antibody incubation, and chromogen counterstaining were performed in a BenchMark ULTRA automated immunostainer (Ventana, Tucson, AZ) as previously described.10 (link)