My mom has been suspected with gallbladder cancer, there seems to be 4 swollen lymph nodes in it. The liver touch wood hasn't been affected yet. But her ca 19.9 is high 870. What does it mean?

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.