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CA 15-3

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Also known as: CA-Breast; Cancer Antigen-Breast
Formal name: Cancer Antigen 15-3

Board approvedAll content on Lab Tests Online has been reviewed and approved by the Editorial Review Board.

At a Glance

Why Get Tested?

To monitor the response to treatment of invasive breast cancer and to help watch for recurrence of the disease

When to Get Tested?

When you have been or are being treated for invasive breast cancer

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?