
Neuroendocrine Tumours (NETs) – Vitamin D (Cholecalciferol / Ergocalciferol)
Vitamin D deficiency is demonstrably more common in people with neuroendocrine tumours (NETs) — but that does not automatically mean your deficiency is caused by
I first wrote this article in December 2014. My thoughts went back to my first surgery in 2010 when I was discharged 4 weeks before Christmas.
I had been diagnosed with metastatic Neuroendocrine Cancer in July 2010 having been told it was incurable. However, with ‘debulking’ surgery, my Oncologist said my prognosis could be significantly improved. I now know from my own research that Neuroendocrine Tumours are one of a small number of cancers for which surgical debulking can confer some survival advantage.
Another term used at the time was ‘cytoreductive’ surgery which means ‘to control symptoms and improve survival by removing or destroying disseminated tumour metastases’. Less neuroendocrine tumours should result in lower secretions of specific hormones which in turn should decrease the effects of Carcinoid Syndrome which was affecting me at presentation. I’m still alive and kicking and don’t feel too bad at all!
The 9 hour operation was planned to debulk what was described as “extensive intra-abdominal neuroendocrine disease” and was first of a number of visits to an operating theatre. The surgeon removed 3 feet of small intestine at the terminal ilium plus a right hemicolectomy, a mesenteric root dissection taking out the nodes on the superior mesenteric artery and a mesenteric vein reconstruction. With the assistance of a vascular surgeon, my NET surgeon also dissected out a dense fibrotic retro-peritoneal reaction which had encircled my aorta and cava (almost occluding the latter). This was a risky procedure but 270º clearance was achieved. Although it was known I also had liver metastases and some distant ‘hotspots’, those were to be tackled at a later stage (read about those below).
I left the hospital some 19 days after 9th Nov 2014 and was delicate for some weeks after that. I don’t recall what the plans were for Christmas Day that year but everything was changed so that it could be hosted at home organised by my ‘right-hand’ woman – Chris. It was a good plan, as I just wouldn’t have been able to go elsewhere and it was the best gift I could hope for that year. My 3 grandsons (I have 4 now !) were under strict orders not to jump on me – I had a 12 inch north to south wound still healing! However, I suspect the youngest who was not yet 2 years old at the time, didn’t really understand 🙂 I do have priceless grandchildren!
Not long after the present exchanging and the meal, I was so exhausted that I laid down and fell asleep immediately as a hint that I should be left alone for a bit! I thoroughly enjoyed the day and it functioned as a medicine along with the many others I was taking at the time. The whole day reminded me that I have a lot to live for, so I’m thankful for the surgery.
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Sure it has, many cancer treatments do. But with experienced surgeons well versed in NET and anatomy, side effects can be derisked, treated and controlled. What you have to consider is that sometimes certain surgeries are risky, some surgeons may prefer to watch and wait before surgery.
It’s also worth mentioning that not treating NETs may have worse side effects.
Surgery is a common treatment for NETs, for some scenarios, it will be attempted with curative attempt. For others, debulking followed (adjuvant) or preceded (neoaduvant) by non-surgical treatment, and then surveillance.
This blog post summarises the most common treatment options.

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Please also note that mention of a clinical service, trial/study or therapy does not constitute an endorsement of that service, trial/study or therapy by Ronny Allan, the information is provided for education and awareness purposes and/or related to Ronny Allan’s own patient experience. This element of the disclaimer includes any complementary medicine, non-prescription over the counter drugs and supplements such as vitamins and minerals.
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