Pet Scan To Diagnose Primary Liver Cancer?

I have two tumors on my liver, very small ones, about 1 cm each.  They are located close to my lung so the intervention radiologist does not want to do a biopsy but instead wants to do another CT scan in 3 months.  I have asked about doing a PET scan which shows increased sugar uptake in cancer cells to see if we can determine whether the tumors are cancerous.  The gastroenterologist however gives me a blank look and says that only oncologists order PET scans, not him.  This seems an inadequate explanation to me.  When I asked why, he just stammered and didn't really answer me.

 Should I return to my GP for another referral or is this normal?  Should I just wait he 3 months for another CT to see if the tumors grew?  By way of background, my blood tests were all normal, no hepatitis, no chirrosis, no tumor markers.

I would appreciate any insight or experience people have.  I understand that most liver tumors are benign but it is hard not to worry.

Fatty infiltration of the liver is common, the solid nodule must be what has them a little worried.  I don't have the scans but the concern would be the size and what it looks like.  That would be the criteria for aggressive workup or observation.

Yes, it is very small.  They are still saying they think it is an adenoma which is benign.  And I did take high dose birth control pills in my 20's so that would fit.  I guess I have to accept that observation for 3 months with a new CT scan is not likely to change outcome or treatment.  Even if it grows and is cancer, at less than 5 cm, if they remove that part of the liver, the chances of cure are still quite good.  I am trying to be optimistic, especially since it is so very very rare to have a primary liver cancer without hepatitis or cirrhosis -- and I have neither of those -- and no tumor markers.  Let's hope that the odds continue to play in my favor.  Thanks for your thoughts so far and for any new ones you come up with!

I hope you're well and that your 3 month follow-up was successful in determining what kind of tumor you have.

 Reading your post I was reminded of my own story.  They found a tumor April 2007, a CT & MRi, then a biopsy- results indicated a benign tumor.

My symptons continued and I was still looking for answers.  Went to another doctor November 2007 and had another CT.  The tumor had doubled.  Had a liver resection January 2008 and it is cancer, stage II.  My 3 month check is coming up and I hope to be clean of cancer.

 Keep following up and let me know how you're doing.

Nancy