Prognosis and response to treatment

Prognosis

Prognosis describes the likely outcome of an illness. Healthcare professionals use prognosis to help guide treatment decisions.

In non-small cell lung cancer (NSCLC), prognosis is influenced by several factors, including:

A person’s general health and fitness.
How far the cancer has spread (the stage).
The specific type of cancer and any gene changes (biomarkers).
How well the cancer responds to treatment.

Prognosis statistics are based on groups of people, but each person’s experience is unique.

Response to treatment

Healthcare teams monitor how treatment affects both the cancer and the person receiving it. Regular check-ups, scans, and blood tests, are used to track progress and measure the size of tumors, and make adjustments as needed.

NSCLC may respond to initial treatment in different ways:

Complete response – there are no signs of cancer.
Partial response – the cancer becomes smaller.
Stable disease – the cancer is not growing.
Disease progression – the cancer continues to grow despite treatment.

When scans show no signs of cancer, the disease may be described as having no evidence of disease (NED). NED can be temporary or long-lasting, and regular follow-up is important.

If NSCLC does not respond well to initial treatment, other therapies may be considered. These might include different medications, clinical trials, or supportive care to help manage symptoms and maintain quality of life.

References

Macmillan Cancer Support. What is a cancer prognosis? https://www.macmillan.org.uk/cancer-information-and-support/diagnosis/what-is-a-prognosis. Reviewed Jul 1, 2023. Accessed Mar 4, 2026.
Cancer Research UK. Survival for lung cancer. https://www.cancerresearchuk.org/about-cancer/lung-cancer/survival. Last reviewed Oct 7, 2025. Accessed Mar 4, 2026.
National Cancer Institute. NCI dictionary of cancer terms. https://www.cancer.gov/publications/dictionaries/cancer-terms. Accessed Mar 4, 2026.
National Cancer Institute. Non-small cell lung cancer treatment (PDQ®)–patient version. https://www.cancer.gov/types/lung/patient/non-small-cell-lung-treatment-pdq. Updated May 16, 2025. Accessed Mar 4, 2026.