Hi,
Ca19-9 tumor marker is not a reliable test for detection of CC. esp. for intrahepatic CC. However when the CA19-9 cutoff value was raised to 100,the specificity was found to be higher in patients with peripheral CC.
My best suggestion to you is :
Try to ask the doctor to get the PET Scan done as soon as possible if one had not been done within the last couple months.If a CT was done within the last couple months and shown nothing,then ask to do a MRI.
MRI with contrast is the best chose of scans to detect lesions<1cm .
Only the scan will give you a definite answer.
Recurrence is common in CC but there are still many ways to combat this disease ;among them, radiation frequency ablation(RFA ) is one of the option if surgery is not indicated.
God bless.