NF1 and neurofibromatosis: STS, soft tissue sarcomas; MRT, malignant rhabdoid tumor; CNS, central nervous system; MPNST, malignant peripheral nerve sheath tumor; NF-1, neurofibromatosis type 1; NF-2; neurofibromatosis type 2, GI, gastrointestinal; NA, data not available.