NF1 and neurofibromatosis: Finally, NF1 genetic testing has become clinically available with a high detection rate21 and clinically useful genotype–phenotype correlations have been identified.22 With sponsorship from the Children’s Tumor Foundation (CTF), an international panel of neurofibromatosis and schwannomatosis experts was assembled in 2017 and charged with reviewing diagnostic criteria for NF1, NF2, and schwannomatosis.