Ronny Allan’s Glossary of Terms (Basic Edition)
Welcome to my Neuroendocrine Cancer terms and definitions list providing a source of meanings for acronyms and medical terms, all sourced from top cancer/Neuroendocrine Cancer sites. This version is a simple combination of an intelligent search (e.g. type first character to filter etc) plus a simple long list of all the terms in my repository. But each has a link which will direct you to the definition of the term plus where applicable, links to any of my articles where I have tagged this term (therefore providing added context).Please note I’m constantly working on the repository to clean up all definitions, adding…
Catch up on Ronny Allan’s Blog
You guys lead busy lives but the aim of this article is to help you catch up. Below are the most read posts in the last 7 days. Click on anything that takes your fancy. Many thanks. To read any article, just click on the title/picture below Latest from Instagram https://www.instagram.com/neuroendocrine.cancer.ronny/ Select of category of posts you'd like to see Disclaimer I am not a doctor or any form of medical professional, practitioner or counsellor. None of the information on my website, or linked to my website(s), or conveyed by me on any social media or presentation, should be interpreted as…
Ronny Allan – Every picture tells a story
I always try to use graphics for a number of pictures, I admit mainly to catch people's attention but also because sometimes a picture on its own tells a story or at least provides a great introduction to one. If the picture catches your eye, clicking on will take you to the text. This post will auto update as new blogs are published. thanks for reading and sharing! Scroll, point, click, read, share! Disclaimer I am not a doctor or any form of medical professional, practitioner or counsellor. None of the information on my website, or linked to my website(s),…
A spotlight on Grade 3 (High grade) Neuroendocrine Neoplasms
Reviewed and updated 3rd Jan 2025 High Grade Neuroendocrine Neoplasms - the forgotten patient group? When reading articles in the mainstream media, found in medical publications; and even listening to doctors speak about my disease, it's clear that the focus is on the term "Neuroendocrine Tumours" or NET for short. Many websites of advocate foundation organisations and specialist scientific organisations, all still use the term "NET" in their naming. I too am guilty of having a large Facebook site falling into this category. It's little wonder that those with high grade disease can often feel like the forgotten patient group. …
European Neuroendocrine Tumor Society (ENETS) 2024 guidance paper for the management of well-differentiated small intestine neuroendocrine tumours
Small Intestine NETs The latest European Neuroendocrine Tumor Society (ENETS) 2024 guidance paper for the management of well-differentiated small intestine neuroendocrine tumours As someone who was diagnosed with metastatic small intestine NETs in 2010, I've clearly written many words about my own experience and how I was treated. However, I've also researched extensively about these issues including previous guidelines for the management of these common but complex tumours. They are mostly indolent, but they can be aggressive; they are legendary spreaders, often in silence. They can cause damage before and after diagnosis, and it is these tumours that are predominately…
A spotlight on duodenal Neuroendocrine Neoplasms (dNENs)
What are Duodenal Neuroendocrine Neoplasms (dNEN)? The duodenum is technically part of the small intestine, and you can find that in most anatomy-based descriptions. One of the research references I used was titled "Somewhere between the pancreas and the small intestine" and in the case of Duodenal NENs (dNENs), I can understand why they adopted that unconventional anatomy description. I suspect they contextually meant that they are not like either of these organs, but they share some similarities. They are not normally treated like small intestine NETs (SI NETs) or pancreatic NETs (pNETs) but they share some relationships, particularly with…
A spotlight on Rectal Neuroendocrine Neoplasms
What are Rectal NENs Rectal Neuroendocrine Neoplasms (NENs) (rNENs) account for approximately 1-2% of all primary cancers in the rectum. The other main cancer types found in the rectum are regular adenocarcinomas (the vast majority) and some other rare types including Gastrointestinal stromal tumors (GIST) and Lymphoma. The vast majority of rNENs will be well differentiated, i.e. rectal Neuroendocrine Tumours (rNETs) and are mostly indolent tumours treated effectively with surgical procedures if less than 1cm in size. Above that size there are different scenarios. Most will be found incidentally upon presentation of classic rectal symptoms or via colonoscopy screenings and…
A spotlight on Appendiceal Neuroendocrine Neoplasms
What are Appendiceal NENs Appendiceal Neuroendocrine Neoplasms (NENs) account for approximately 60% of all primary cancers in the appendix. The other main cancer types found in the appendix are regular adenocarcinomas (including signet ring cell and goblet cell) and mucinous neoplasms such as Pseudomyxoma Peritonei (PMP) or Low-Grade Mucinous Neoplasms (LAMD). Appendiceal neuroendocrine tumours (aNET) (i.e. well differentiated) account for 75% of all aNENs, are mostly indolent tumours treated effectively with simple appendectomy. In fact, most are incidentally found upon presentation of right lower quadrant (RLQ) pain in keeping with appendicitis. They are typically (but not exclusively) diagnosed in younger…
A spotlight on Gastric Neuroendocrine Neoplasms
What are Gastric NENs Unlike other anatomical types, the word Gastric is used to indicate a tumour (NET) or carcinoma (NEC) in the stomach. The stomach lies at the bottom of your oesophagus and connects to the first part of the small intestine (the duodenum). Clearly a key part of the gastrointestinal system, it processes food on its journey downwards. The stomach produces strong acid. This kills many microorganisms that might have been swallowed along with the food. It also contains special chemicals called enzymes. These are important for breaking down the food so it can be absorbed by the…
A Spotlight on Lung Neuroendocrine Neoplasms
WHO Classification of Tumours, 5th Edition, Volume 5: Thoracic Tumours The aim of this spotlight is to provide a summary of the latest information on Lung Neuroendocrine Neoplasms (NEN) including the latest terminology, epidemiology data, and guidelines. This follows the publication of the Thoracic WHO classification 5th edition (2021): terminology and criteria for neuroendocrine neoplasms (Blue Book). This book has been anticipated to see if the panel compiling this follows the lead of the Gastroenteropancreatic Neuroendocrine Neoplasms (GEPNEN) editions issued in 2017 (Endocrine) and 2019 (Digestive systems) by removing the antiquated misnomer term ''Carcinoid" in line with the recommendations made…
Neuroendocrine Tumours: a spotlight on Pheochromocytoma and Paraganglioma
Updated 19th August 2025 I spend a lot of time talking about the most common forms of Neuroendocrine Tumours (NETs), but what about the less well-known types? As part of my commitment to all types of NETs, I'd like to shine a light on two less common tumour types known as Pheochromocytomas and Paragangliomas - with an incidence rate of approximately 8 per million per year. They are normally grouped together, and the definitions below will confirm why. If you think it's difficult to diagnose a mainstream NET, this particular sub-type is a real challenge. So, let's get definitions out…