Cancer antigen 15-3 (CA15-3) is a protein produced by a variety of cells, particularly breast cancer cells.
A CA15-3 test may be done to check:
A CA15-3 test is usually done in a private laboratory or hospital laboratory. No special preparation is usually needed.
An increased CA15-3 value can occur in non-cancerous and cancerous conditions.
In cancerous conditions:
The doctor will decide if more tests, procedures, follow-up care or additional treatment is needed.
For more than 50 years, the Canadian Cancer Society’s transportation program has enabled patients to focus their energy on fighting cancer and not on worrying about how they will get to treatment.