In the setting of multiple meningiomas, although NF2-SWN is the most common tumour predisposition condition for people with ≥ 2 meningiomas before age 40, peripheral schwannomas and intracranial meningiomas can be seen in the chromosome 22 condition SMARCB1-SWN. This evidence concerns the gene NF2 and intracranial meningioma.