Fig. 3

a Hematoxylin–eosin stain. Under the microscope, the neurofibroma is characterized by interlacing bundles of elongated cells with wavy, hyperchromatic nuclei. The tumor has a myxoid background with strands of collagen mimicking shredded carrots, × 200. b Stain of S-100. Part of the tumor cells is immunoreactive for S-100, × 400, (c) Stain of neurofilaments. Axons within the neurofibroma are demonstrated with neurofilaments, × 400