Survivor since 2009
Martha, I went over to the Cancer Research Institude site and I found this information concerning Tumor Markers;
"Tumor marker levels also may be used to check how a patient is responding to treatment. A decrease or return to a normal level may indicate that the cancer is responding to therapy, whereas an increase may indicate that the cancer is not responding. After treatment has ended, tumor marker levels may be used to check for recurrence (cancer that has returned)."
Hope this helps
Hugs from Alice