SMARCB1 and schwannomatosis: SWN is a clinical distinct entity as a result of germline NF2 (22q-related schwannomatosis), or SMARCB1 (SMARCB1-related schwannomatosis), or LZTR1 variant (LZTR1-related schwannomatosis), which are located centromeric to NF2 on chromosome 22 [74,77].