Micrograph neurofibroma

(A) Low-power (H&E, x100) and (B) High-power (H&E, x600) micrographs illustrate a neurofibroma of the C1 nerve root. The tumor is moderately cellular, and the tumor cells are spindle shaped. The tumor is rich in collagen (B, arrow). Axons course through the middle of neurofibromas; a Bielschowsky or neurofilament stain is required to see them.