Ependymoma : EMA Immunostain

With EMA, some cases show characteristic dot-like positivity within the cytoplasm. Under electron microscopy, the target organelle appears to be clusters of microvilli and cilia enclosed within intracytoplasmic spaces. Courtesy of: Dr. Luciano de Souza Queiroz, Dept. of Pathology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, Sao Paulo State, BRAZIL. Additional images are here.