Neuroimaging features of scalp plexiform neurofibroma in a patient with neurofibromatosis type 1

Fifty-two-year-old with an extensive T1-isointense (A) and mildly T2-hyperintense (B, C) mass involving the right frontal scalp and periorbital soft tissues, stable for many years. Unlike solitary neurofibroma, plexiform neurofibroma is a disorderly proliferation of multiple nerves and their branches with interwoven blood vessels.