Ductal carcinoma in situ is a precursor of breast cancer that is usually treated with surgery, radiation therapy, and estrogen blockade. A new study (COMET) suggests that watchful waiting might be safe for low risk DCIS.

Ductal carcinoma in situ is a precursor of breast cancer that is usually treated with surgery, radiation therapy, and estrogen blockade. A new study (COMET) suggests that watchful waiting might be safe for low risk DCIS.