SMARCB1 and neoplasm: To confirm SMARCB1 status in publicly available EPS cell lines and primary culture resources, we performed protein studies of SMARCB1 via western blot (Figure 2A, Tables 1 and 2) and compared expression against SMARCB1 levels in SMARCB1 wild type (WT) a normal cell line (HEK‐293) and SMARCB1 null rhabdoid tumour cell lines (G401, BT‐12).