The human SMARCB1 c.1148 cytosine point deletion (SMARCB1 c.1148del/p.P383RfsX100 (COSM1057)) is closely associated with the formation of ATRT of the central nervous system and was also reported in tumours of the soft tissue and the thyroid gland (Tate et al. 2019). This evidence concerns the gene SMARCB1 and atypical teratoid rhabdoid tumor.