explants of 21 neurofibromas from 16 patients with von recklinghausen neurofibromatosis ( nf-i ) plus tumour tissue from 5 comparison patients and normal tissue from one of the nf-i patients were assayed for neuronal growth factor ( s ) using dissociated embryonic sensory neurons from chick embryo .
C0027830
neurofibromas
C0085113
von recklinghausen