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

David A. Fishman, MD
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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