CA 15-3

What this laboratory test evaluates

DetailsCA 15-3 (Cancer Antigen 15-3) is a protein that may be elevated in the blood of individuals with certain types of cancer, especially breast cancer. It is primarily used to monitor response to treatment and detect recurrence rather than for initial diagnosis, as levels can also be elevated in non-cancerous conditions.

What type of sample is required for this test?Serum

Test ResourcesFor more information, please consult your healthcare provider.

Additional test information

CA 15-3 (Cancer Antigen 15-3) is a protein that may be elevated in the blood of individuals with certain types of cancer, especially breast cancer. It is primarily used to monitor response to treatment and detect recurrence rather than for initial diagnosis, as levels can also be elevated in non-cancerous conditions.

Collection and processing

• Sample type: Serum
• Fasting: No
• Estimated laboratory processing: Results should arrive 2 business days after the lab receives samples.

How Sunridge uses laboratory information

Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.

Before requesting this test

Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.