Description
Why It’s Done:
This test is ordered to:
• Classify breast cancer subtype (e.g., hormone receptor-positive, HER2-positive, triple-negative).
• Predict the tumor’s behavior, including likelihood of growth and spread.
• Guide treatment decisions, such as:
o Hormonal therapy (if ER/PR positive)
o Targeted therapy (if HER2-positive)
• Assess prognosis—certain receptor combinations are linked with more or less aggressive disease.
• Monitor response to treatment and adjust therapies accordingly.
Preparation:
• No special preparation is needed from the patient.
• The test is performed on a biopsy or surgical tissue sample taken from the breast.
• Follow any instructions provided before the biopsy procedure (such as fasting or medication adjustments, if applicable).
• Inform your doctor about all medications, supplements, or existing health conditions
