Which cancer is associated with the antigens 15-3 and 27.29?

• A. Colon cancer
• B. Breast cancer
• C. Liver cancer
• D. Lung cancer

Answer: (B)

The antigens 15-3 and 27.29 are specifically associated with breast cancer. These are tumor markers used in monitoring the disease and assessing treatment response. The CA 15-3 and its variant, CA 27.29, are often elevated in patients with breast cancer and are particularly useful in tracking the progression or recurrence of the disease rather than being used for initial diagnosis.

In clinical practice, the measurement of these markers can help provide valuable information regarding the patient's condition as treatment progresses. The specificity of these antigens makes them relevant primarily for breast cancer, distinguishing it from other cancers such as colon, liver, or lung cancer, which have different markers associated with their pathology.