Monarch Disease Ontology id MONDO_0018975 (neurofibromatosis type 1) is a clinically heterogeneous, neurocutaneous genetic disorder characterized by cafe-au-lait spots, iris Lisch nodules, axillary and inguinal freckling, and multiple neurofibromas. Also known as: NF1, Neurofibromatosis 1, Nf1-Microdeletion syndrome, neurofibromatosis 1, neurofibromatosis type i, neurofibromatosis, type 1, nonmosaic NF1, nonmosaic neurofibromatosis type 1.