G'day Slacker,
I have carcinoid syndrome but no tumours (Aussie spelling) found. But my Mum had 9 tumours found in her small intestine at Easter time this year. They were all smaller than 8mm. They had metastasized to 1 lymph node.
I have had two Gallium 68 Dotatate PET scans, not showing anything. Each time I have had one I have asked the radiographers how big a tumour needs to be to show up, and they always say 1cm. So my Mum's tumours would not have shown up on a PET scan.
I have been on Sandostatin LAR for 18 mths, and unfortunately the last two months my injections have not been as effective and I am getting my symptoms back (including the upper right abdo pain) after 3 weeks. I am seeing my doctor on Monday, and am going to ask if I can have exploratory surgery now that we know where my Mum's tumours were. Perhaps they will find something to explain the upper right abdo pain if I have surgery.
There is an article that would be good for you to give to your doctor because it talks about how tumours smaller than 1cm can still be active and metastasize. Let me know if you can't download a free copy and I will e-mail it to you:
"Early-Stage Carcinoids of the Gastrointestinal Tract" by Jun Soga in Cancer April 15, 2005 / Vol 103 / Num 8
I have also seen quotes by a carcinoid specialist saying that the amount of activity (i.e. how bad your syndrome is) is not related to tumour size, so you can have a large tumour that secretes very little, or a tiny tumour that secretes a lot. I have also seen quotes that talk about the fact that mets can be only millimeters in size, therefore don't show up on any scans.
Another Australian I talk to recently had a PET scan which showed something like 3 tumours and 4 lymph nodes, but when he went in for surgery they removed 40 tumours! So Carcinoid as a disease is very difficult to pin down.
Blessings, Lauri.