Date Posted
![](/sites/default/files/2023-02/liquid-biopsy-2019-02-08.jpg)
Liquid biopsy is useful when:
- not enough tissue sample is available
- not enough tumor tissue is in a sample
- a tumor is hard to reach
- regular monitoring is needed
Liquid biopsies are analyzed for:
- presence of cancer cells
- DNA
- other substances released by tumors