What are tumor markers?

Tumor markers are specific substances that can be found in the blood, urine, or tissues, which may indicate the presence of cancer. They are often proteins produced either by cancer cells or by normal cells in response to cancer. Monitoring the levels of these markers can help in diagnosing cancer, determining prognosis, and assessing the effectiveness of treatment.

The definition captures the essence of tumor markers as indicators that can signal the presence of cancer. They are not exclusively symptoms, imaging results, or genetic changes, which enhances the understanding of their role in patient management and cancer care. By measuring tumor markers, healthcare professionals can obtain valuable information that aids in the development of personalized treatment plans and monitoring disease progression.