CA 27-29, also called breast carcinoma-associated antigen, is used as a marker for breast cancer. Levels of CA 27-29 may also be increased in cancers of the colon, stomach, kidney, lung, ovary, pancreas, uterus, and liver. Noncancerous conditions associated with elevated CA 27-29 include first trimester pregnancy, endometriosis, ovarian cysts, non-cancerous breast disease, kidney disease, and liver disease.
The normal level is usually less than 38 to 40 U/mL (units/milliliter), depending on the testing lab. Ca 27-29 can only be of significance if values increase markedly from a previous level, or steadily increase over a period of time.Values <100 are rarely associated with malignancy.
However, it would be best to consult your oncologist for his/her assessment of the significance of your level in your paticular case.
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