<prompt> Answer this question truthfullyWhat role does MRI play in the diagnosis of neurofibroma?  <response>: <reason> MRI may be helpful in the diagnosis of neurofibroma MRI signal characteristics include: MRI sequence Characteristics T1 Hypointense Homogeneous low signal intensity Center demonstrating a higher signal intensity than the periphery reverse of target sign on T2 T2 Hyperintense Homogeneous high signal intensity higher than fat Target sign plexiform neurofibromas Low signal intensity centrally with a ring of high signal intensity peripherally Due to a dense central area of collagenous stroma Highly suggestive of neurofibroma but occasionally also seen in schwannomas and malignant peripheral nerve sheath tumors Fascicular sign Plexiform neurofibromas may appear as a larger and more infiltrating mass with lobulated borders with inhomogeneous enhancement Myxoid stroma enhancement helps differentiating the high signal intensity at T2- weighted imaging from cystic change or necrosis T1 C Gd with gadolinium contrast Heterogenous enhancement 