TriangleFOR PATIENTS · SOURCE READING
Treatment of stage 0 breast cancer (ductal carcinoma in situ)
Source: Breast Cancer Treatment by Stage, National Cancer Institute.
Source updated: December 2, 2025 · Captured 2026-09-09.
Selected source text with whitespace normalised. This Triangle page is not an NCI PDQ summary. Independent clinical review is pending.
NCI patient treatment article for this disease Exact source article; not a clinically reviewed indication or current-standard recommendation.
Context: Breast Cancer Treatment by Stage
Treatment of stage 0 breast cancer (ductal carcinoma in situ)
Ductal carcinoma in situ (DCIS) is a condition where abnormal cells form in the lining of the milk ducts but have not spread. It's not cancer, but it may develop into invasive cancer.
Source links and citations
Treatment of ductal carcinoma in situ may include lumpectomy with radiation therapy, mastectomy with or without radiation, and hormone therapy if biomarker testing suggests it may be helpful.
To learn more about DCIS and how it is treated, visit Ductal Carcinoma in Situ.
Source links and citations
Preserved source evidence · Independent clinical review pending · Not medical advice