
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
The term invisible illness refers to any medical condition that is not outwardly visible to others, even healthcare professionals. Invisible illnesses encompass a broad range of conditions, including heart disease, diabetes, dementia, psychiatric illness, autoimmune disorders, and even cancer.
Many Neuroendocrine Cancer patients look outwardly healthy, and this can often lead to a lack of appreciation of the potential dangers lurking in their life, the person’s actual capabilities, and how they cope with their condition.
I am sure those reading who have a Neuroendocrine Cancer diagnosis will find something similar to their own experiences.
I had no idea the cancer was growing in me for years. Perhaps some of my routine illnesses weren’t as routine as I thought. Sorry too late, I’m metastatic, and up to 50% of patients (depending on primary location) will be at diagnosis (so I’m not alone!). It’s very SNEAKY!

I mean, I look really good, I look really well, but you should see my INSIDES. One radiographer described my insides as a battlefield.


I really didn’t know what to make of this issue at diagnosis, although I did know the aorta was pretty important! Fortunately, I had a surgeon who had operated on many NET patients and had seen this issue before. After my first surgery, he described it as a “dense fibrotic retroperitoneal reaction encircling his aorta and cava (inferior vena cava (IVC))”. My surgeon was known for difficult and extreme surgery, so as part of the removal of my primary, he also spent 3 hours dissecting the retroperitoneal fibrosis surrounding these important blood vessels and managed 270-degree clearance. The remnant still shows on CT scans. Some of the removed tissue was tested and found to be benign, showing only florid inflammation and fibrosis (thankfully). That said, the abstract papers above have led me to believe that my retroperitoneal fibrosis is clinically significant. In fact, I have spent the last 3 months worrying about some of it growing into the reach of important vessels and only just been given the all-clear (for now).

There are many hormones involved with Neuroendocrine Cancer which is unique in that different types can result in elevated levels of different hormones, often more than one is involved. Serotonin has caused fibrosis in my retroperitoneal area and is currently threatening important vessels. I don’t really need that right now!
I was showing symptoms of a Neuroendocrine Cancer syndrome known as Carcinoid Syndrome (currently) such as flushing and diarrhea and fatigue was probably there too, but these were thought to be something else or ignored (by me). I don’t suffer too much nowadays other than the side effects of the disease or the treatment I’ve had or received. However, I know from speaking to many patients that the effects of the various syndromes associated with Neuroendocrine Cancer can be pretty debilitating and oppressive to quality of life. But much of this is handled inside closed doors. You would not know if you bumped into this person in a shopping complex or cinema or holiday resort.
These syndromes can be so strange and so weird, that they can be very difficult for patients, nurses, and doctors to treat. They can be a real ‘witch’s brew‘.

But I need constant surveillance, it’ll keep me alive. But no one sees me go through this once or twice (or more) a year.

I have been in pre-diabetes once. My blood sugar often spikes, most likely due to treatment.


You may also enjoy these similar and related articles:
Things not to say to a cancer patient – click here
Shame on you! – click here
Things are not always how they seem – click here
Not every illness is visible – click here
Not the stereotypical picture of sick – click here
An Ode to Invisible Illness – click here
Poker Face or Cancer Card – click here
I don’t look sick, sorry not sorry – click here
You must be doing OK, you’ve not had chemotherapy – click here
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 medical advice given or advised by me.
Neither should any post or comment made by a follower or member of my private group be assumed to be medical advice, even if that person is a healthcare professional. Some content may be generated by AI which can sometimes be misinterpreted. Please check any references attached.
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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