Possible NET with No Evidence of Tumor: Mediastinal Mass

Andre, Thank you for sharing. What was your diagnostic experience? Have they ever found a tumor? Or is it just symptoms and positive testing? Did you have a WREN lab. NETest done? They seemed fairly convinced that my symptoms and biomarkers were highly suggestive of Carcinoid Syndrome, but seem perplexed by the fact that they cannot find a tumor. Anyway, thanks for sharing!!

Thanks so much! It was a really great experience and I loved meeting Dr. THor- he was outstanding, but I only wish he was not perplexed by me! We had a really nice stay at an Air b'n'b in Chatfield. It was a great place for the kids to run around! We really enjoyed Rochester and thought it was a great town! We live about 4 1/2 hours away and have three little ones, so it is quite an adventure to come down, but it was all very coordinated and seemed pretty easy considering all the testing that we had done. Thanks so much!

Hello @megansims, it is so good to hear from you and know that you had a good experience at Mayo. I'm glad that your travel arrangments and lodging worked so well for you and your family.

Did Dr. Thor run any additional tests that you had not had done previously? When do you expect to get the results?

Teresa, Thanks! He ordered a couple of repeat CT scans, had many of my previous images re-read, ordered an FDG-PET scan, and a genetic NETest from WREN laboratories. He is waiting to see the results of the WREN test. He also mentioned that many lung NETs do not show up on the traditional Gallium scan so that is why he added the FDG PET scan. He is also having me do a home 'provocation' test for Carcinoid Syndrome (do not try this at home disclaimer!). He wants me to provoke the flushing with a glass of red wine, start Octreotide 3 times a day, then after 3-4 days, drink another glass to see if I have the flushing or not! He said it was the only time that he ever prescribed a glass of wine for a patient! He is puzzled by the labs- some of the Chromogranin levels have been high (3 of them) and 1 has been normal, and the same with the 5-HIAA (3 of the urine have been high, 1 normal, and 1 high Plasma, and 1 normal). He feels like the tumor should be visible, but he also felt that the symptoms are very suggestive of the syndrome.

Dr. Edward Greeno at the U of M is a neuroendocrine specialist

Have many of you had the WREN lab NETest? I just had it done and the results were 67%. They still have not found a tumor but I am scheduled for an FDG-PET on Thursday.

Hello @megansims,
I'm not familiar with this test but is it a genetic test of some type? I'll be interested to hear about the results as well as the FDG-PET on Thursday,
Will you post again?

My wife did it 3 separate times over a year or more when WREN covered all the costs during their rollout. The results were erratic. Her specialist thought they were interesting, but that’s all. It didn’t help guide her care plan.

Thanks @hopeful33250 ! The PET was negative, I did a 5-day trial of short acting Octreotide and felt amazingly better with no symptoms, so the doctor is pondering starting me on the long-acting even without tumor location. They repeated the genetic test on the Octreotide, just to see what it shows. The mass in my chest is double in size than it was several years ago, so they are talking with thoracic surgery to see what to do about it. It sits in the subcarinal space nestled between my aorta and my pulmonary artery- ick.

Thanks for your update, @megansims.

I am glad to hear that your symptoms have improved with the short-acting Octreotide. You said the doctor is thinking of starting you on the long-acting med even though there is no tumor location. You did mention, however, the mass in your chest. Has this been not been determined to be a NET? Were any biopsies done on this mass that you said has doubled in size?

For you and all other NET patients, I found a website where you can download some great information about NETs free of charge. Here is the link,