Updated 1 August 2026 This section of my website has been published and regularly updated since 2015 but the most recent updates to the World Health Organisation (WHO) Classifications for Digestive and Thoracic Systems are about to be published.  You may see these important publications called ‘Blue Books’. Digestive Systems  The main changes worth mentioning … Continue reading The Classification, Grading and Staging of Neuroendocrine Neoplasms (incorporating WHO 2026 classification changes)