Hello im a new chatter, my dad was diagnosed with bowel cancer 3 years ago, he had a operation to have tumours removed then onto 6 months of chemo. During this time he had spread to his liver then underwent another operation to have a liver resection. Anyway all that was 2 years ago and since has had clear scans. He recently had another CT scan which was clear however his CEA blood test has raised, he is now being sent for a PET scan and we are very worried. Anybody had any experience of this?