This article from pathologist Carl Christofer Juhlin, MD, PhD, of Karolinska Institutet in Sweden identifies second-generation neuroendocrine immunohistochemical markers. These markers can help identify the site of primary neuroendocrine tumors as well as helping to ensure a proper diagnosis for NETs and poorly differentiated neuroendocrine carcinoma. Read more in this open access article here, mdpi.com/1259126.