Where is CA125 (cancer antigen 125) produced in the body?

David A. Fishman, MD on behalf of The Mount Sinai Health System

Gynecologic Oncology

Cancer antigen 125 (CA125) is physiologically expressed in epithelial tissues. Examples of these tissues include those of müllerian origin such as the endometrium, endocervix, and fallopian tubes; and those of coelomic origin such as the pleural mesothelium, pericardial, and peritoneal. CA125 has also been found in the conjunctiva.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.