MedicalResearch.com Interview with: Dr. Frank Vicini, MD, FACR, FASTRO Principal Investigator Radiation Oncologist at GenesisCare Member of NRG Oncology MedicalResearch.com: Would you briefly explain what is meant by DCIS? Response: DCIS stands for ductal carcinoma in situ and indicates the presence of abnormal cells inside a milk duct in one or both breasts. Sometimes referred to as Stage 0 (zero), it is considered the earliest form of breast cancer and is noninvasive. The tumor has not yet left the duct-- a passageway that transports milk from the breast lobules to the nipple-- and begun to invade the healthy tissue surrounding it. Standard treatment options for DCIS include surgery, radiation therapy and hormonal therapy. (more…)