While the incidence rate of neuroendocrine tumours has been increasing, the survival rate has not. Therefore, there is a great need for state-of-the-art research and new treatment protocols. The chapters in this book contribute to that debate and will be required reading for both researchers and healthcare practitioners, as it offers both overviews of the condition and specialized contributions. Topics covered include the association between chronic inflammation and gastroenteropancreatic neuroendocrine tumours, or GEP-NETs. GEP-NETs are also addressed in a chapter on their circulating markers, which can help in diagnosing this hard to detect condition. One chapter covers the role of Chromogranin A, while another addresses the diagnosis and management of neuroendocrine carcinomas in cases where the primary site is unknown.