NF2 and schwannomatosis: Clinical diagnosis: ≥2 non-intradermal SCHs, one pathologically confirmed and no bilateral vestibular SCHs by high quality MRI (some mosaic NF2 patients will be included in the diagnosis at a young age and some schwannomatosis patients may have unilateral vestibular SCHs or multiple meningiomas) or one pathologically confirmed SCH or intracranial meningioma and an affected first degree relative