[Ultrasound diagnosis of isolated vagus neurofibroma in Recklinghausen disease].

We report on an isolated cervical vagus nerve neurofibroma in a patient with neurofibromatosis Recklinghausen. B-scanechography showed a well limited tumor without infiltration of adjacent structures and with cranial and caudal dendrites. The inner structure of the neurofibroma was characterized by a homogenous picture of low ultrasound reflection. Although ultrasound allows an exact description of the tumor's topography, it is impossible to give a histological interpretation by the sonomorphology.