Description of Blood Analysis: 

The CA-15.3 tumor marker is a specific glycoprotein synthesized by the secretory epithelial cells of the mammary glands. In a healthy state, this component rarely enters the general circulation, remaining localized within the breast tissues. An increase in its serum concentration serves as a biochemical indicator of potential cellular transformation or a disruption in the natural cycles of tissue regeneration. This test is a vital monitoring tool that enables physicians to track biological stability, although it does not replace instrumental imaging methods.

What does the analysis represent?

• Purpose: Precision quantitative measurement of CA-15.3 antigen levels in the blood.
• Primary Application: Long-term observation of breast tissue health, assessment of treatment efficacy, and early detection of abnormal cellular activity.
• Method: Laboratory analysis of a venous blood sample using advanced immunochemical detection.

Recommendations for the Test (General)

• Timing: It is optimal to schedule the blood draw for the morning hours.
• Fasting: A fasting period of 4–6 hours prior to the procedure is recommended.
• Rest: Patients should remain in a calm, seated position for 20–30 minutes immediately before the draw.
• Avoidance: For 24 hours before the test, avoid heat exposure (saunas, hot baths), strenuous physical activity, and vigorous chest massages.
• Medications: Inform your physician about any hormonal therapies or supplements (especially those containing biotin).

What can affect the results?

• Factors increasing levels: Benign breast conditions, pelvic inflammatory diseases, pregnancy, or liver function impairments.
• Influencing factors: Current chemotherapy or the use of medications that modify the body’s hormonal balance.

When to take the test?

• Recommendations: The test is typically ordered by a specialist for routine monitoring or to analyze the dynamics of previously identified tissue changes.
• Preparation: To ensure the most accurate data, it is advisable to take the test outside of any acute infectious episodes.

How to interpret the results? 

Interpreting the findings is the exclusive responsibility of your physician. Self-diagnosis based on raw data is strongly discouraged. Minor fluctuations in CA-15.3 levels are often linked to physiological factors or benign processes. A specialist evaluates this marker only in conjunction with mammography, breast ultrasound, and clinical examination to form an objective medical conclusion.

Possible further investigations

• Mammography or Ultrasound: Fundamental imaging techniques for detailed study of breast anatomy.
• Breast MRI: A high-precision diagnostic tool used to clarify ambiguous results from primary screenings.

When does the next step make sense?

If the CA 15.3 test is performed to monitor breast tissue, the results are analyzed holistically alongside imaging data and clinical symptoms. Decisions regarding changes in observation tactics or additional testing are made individually following a professional medical assessment. 

👉 If necessary, you can discuss the analysis results with a specialist such as a oncologist ( Doctors – TAMC ).