SMARCB1 and extrarenal rhabdoid tumor: [4] SMARCB1 (INI1, SNF5/BAF47) was the first member of the SWI/SNF-complex found to be mutated in cancer: families with heterozygous germline SMARCB1 mutations were described with extrarenal rhabdoid tumors with loss of expression of SMARCB1 presenting already in early childhood.