Don’t worry, it’s benign!



OPINION

One of the most controversial aspects of Neuroendocrine Tumours (NETs) is the ‘benign vs malignant’ question. It’s been widely debated and it frequently patrols the various patient forums and other social media platforms. It raises emotions and it triggers many responses ….. at least from those willing to engage in the conversation. At best, this issue can cause confusion, at worst, it might contradict what new patients have been told by their physicians (….or not been told). This post will not cover Neuroendocrine Carcinoma which by definition is malignant.

Any definition of the word ‘tumour’ will confirm it can either be benign or malignant. However, and while I’m sure there are benign NETs, the key statement to explain any slow growing or indolent NET is that they all have malignant potential – thus why surveillance and follow up is really important. This is the key factor in the changes found in the 2010 Digestive System World Health Organisation (WHO) classification system from the previous ‘flaky’ version. This reinforcement of the malignant potential of all NETs was duplicated in the recent 2017 Endocrine System equivalent, which is now proposed as a classification scheme for all NETs (see below).

“Carcinoid”

Of course we are not helped by the continued use of the term Carcinoid which decodes to ‘Cancer Like’ – that is potentially regressing the work of those specialists who are trying to undo the last 100 years of complacency in the medical world (and not really the type of awareness we need). The word is gradually being erased from NET nomenclature and the recent 2018 proposal by the International Agency for Research on Cancer (IARC) and WHO NET expert consensus panel to ditch it from the remaining versions of out of date WHO classifications (e.g. Pulmonary/Lung, Pituitary, Head & Neck, Genito-urinary, Adrenal and Paraganglia, Skin), is the final nail in the coffin for Carcinoid. RIP Carcinoid. This also supports our awareness issues with the media reporting the wrong cancer types based on anatomy of the primary tumour. Dear Doctors, Patient Advocates and Patients ….. please stop using the word!

I have lost count of the stories from Neuroendocrine Cancer patients who have been told their tumour was benign but then returned with incurable and metastatic cancer sometime downstream. Clearly there are doctors who do not understand NETs and/or are not aware of the changes in WHO classification schemes since 2010. Sure, some will prove to be ‘benign’ in nature and may not cause many issues but any Ki-67 below 3% is a formal grade of Neuroendocrine Neoplasm. I accept that it’s currently difficult to work out which cases will turn more aggressive and when, thus why surveillance and follow up are really important and also why patients should be seeing doctors who understand NETs. Worth also noting that many slow growing and indolent tumors can still often produce troublesome NET syndromes.

I’ve even heard one patient story where it was claimed a doctor called a metastatic NET case benign! Any definition of ‘benign’ on any respectable cancer site, will include the statement that they do not spread to other parts of the body. The NET Patient world is full of slow growing Grade 1 Stage 4 patients – by definition, they’re all malignant.

Read more detail in these articles as these issues are inextricably linked.

‘Benign vs Malignant’.
‘Carcinoid vs Neuroendocrine’
‘The Invisible NET Patient Population’
‘Staging and Grading’

I’m sure there are scenarios in all cancers where tumours can be benign and will never harm the person but if a Doctor says you have a Neuroendocrine Tumour and not to worry because it’s benign, ask questions.  Start with “how do you know it will never turn malignant” and “what will be done going forward to check”. 

Thanks for listening

Ronny

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Author: Ronny Allan

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