This transmission electron micrographs shows (near the center of the image) a tangled cluster of neurites sectioned in various planes. With routine H&E stain, they appear as pink fibrillary material and are especially prominent in the differentiating subtype of neuroblastomas. Courtesy of: Dr. Luciano de Souza Queiroz, Dept. of Pathology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, São Paulo State, BRAZIL. Additional images are here.