Understanding Lab Tests for Certain types of cancer
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Cancer is typically diagnosed through a combination of imaging studies, biopsies, and physical examinations. There isn't a single blood test that can definitively diagnose cancer; however, laboratory testing plays a fundamental role in assessing the body's response to cancer, monitoring for complications, and evaluating metabolic changes that may occur with certain types of malignancies.
Top Recommended Test
Calcium, Ionized, Serum
This test measures the active form of calcium in the blood. Certain types of cancer, particularly breast cancer and lung cancer, can lead to elevated calcium levels (hypercalcemia), which is an important metabolic complication that requires monitoring and management.
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Why Blood Testing is Important in Cancer Care
Certain cancers can cause significant changes in blood chemistry by affecting organ function, altering metabolism, or producing substances that impact normal physiological processes. Blood tests are essential for detecting these secondary effects, monitoring overall health status, and helping healthcare providers understand how cancer may be affecting the body's systems.
Other Relevant Tests
Creatinine, Serum
This test evaluates kidney function by measuring creatinine levels in the blood. Some cancers may lead to elevated creatinine levels, particularly those involving the kidneys or prostate, as these malignancies can directly or indirectly affect kidney function and waste elimination.
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Iron storage test
This test measures ferritin, a protein that stores iron in the body. Elevated ferritin levels can be associated with certain types of cancer, including leukemia and Hodgkin's lymphoma, as cancer cells often require substantial amounts of iron to support their growth and proliferation.
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Important Considerations
These blood tests help monitor secondary effects and complications associated with certain cancers but are not diagnostic tools for cancer itself. Abnormal results should always be interpreted by a healthcare provider in the context of clinical symptoms, medical history, and other diagnostic findings. The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
