Tests That Monitor Response to Cancer Treatment

Once cancer treatment has started, one of the most important questions is whether it is actually working. A range of tests can help monitor response over time, giving patients and clinicians a clearer picture of how the cancer is behaving during treatment.

These monitoring tests may include imaging scans, blood tests, tumour markers, circulating tumour DNA, and other forms of assessment, depending on the type of cancer and the treatment being used. Some are already well established in standard oncology practice, while others are newer and still being evaluated for how reliably they can track treatment response in real time.

No single test can provide a complete picture on its own. Results usually need to be interpreted in context, alongside symptoms, clinical examination, and the broader course of treatment. Even so, response-monitoring tests can sometimes help show whether a treatment appears effective, whether the cancer is stable, or whether a change in strategy may need to be considered.

What tests are available and where can I get one?

Oncotrace
Available from R.G.C.C Group

HCG Urine Immunoassay
Available from: Navarro Medical Clinic

Maintrac
Available from: maintrac and Genostics

NextGenOncology (Germany)

Metastatic breast, prostate, or colorectal cancer.
CellSearch
Available from CellSearch. 

Last updated January 2026