Hello I am Bobbie Jensen a caregiver and my husband has had two PET Scans since the onset of his cancer stage iv in the back of the tougue and mastized in the lymphnodes by his juglar vein. I really do not see the need but his ono believes in them but does says they are new and sometimes do not pick up what the MRI does if they are not read right. So he has had the Pet Scans since July and one in November after radiation and chemo was done. Yesterday he went for a Biopsy under the tumor that was shrunk because his scan still lit up so will see on Monday what that brings are praying everything is ok and it was scar tissue. I pray for all of you and read all of your issues and it really helps alot thanks