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Labcorp
Broadest draw-site network nationwide.
Quest Diagnostics
Same-day appointments in most metros.
CA 27-29 is a tumor marker primarily used to monitor breast cancer. It measures a protein released by cancer cells into the blood. Like CA 15-3, it is used to assess treatment response and detect recurrence, but it is not recommended for initial diagnosis due to possible elevation in non-cancerous conditions such as liver disease or benign breast disorders.
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