SHH and neoplasm: For hATRT‐SHH, tumor areas were designated based on SWI/SNF‐related matrix‐associated actin‐dependent regulator of chromatin subfamily B member 1 (SMARCB1) negativity in IHC, a hallmark of ATRT, and GFP positivity in immunofluorescence (Figure 1E, Supplementary Figure S4E‐F).