DCIS vs Invasive Breast Cancer: What Is the Difference?
What is the difference between DCIS and invasive breast cancer? Dr. Niharika explains why ductal carcinoma in situ is classified as stage 0, how it differs from invasive disease, and why understanding the diagnosis helps patients make informed treatment decisions.
What Is DCIS?
Ductal carcinoma in situ (DCIS) is a non-invasive breast condition in which abnormal cells remain confined to the milk ducts. It is classified as stage 0 breast cancer and requires appropriate assessment and management.
DCIS vs Invasive Breast Cancer
Unlike DCIS, invasive breast cancer has spread beyond the milk ducts into surrounding breast tissue. Treatment depends on the diagnosis, tumour characteristics and individual risk factors.
- DCIS: abnormal cells remain within the milk ducts.
- Invasive cancer: cells extend into surrounding breast tissue.
- Treatment: depends on the diagnosis and clinical assessment.
Understanding whether breast cancer is non-invasive or invasive helps guide appropriate treatment and follow-up.
Why Early Detection Matters
DCIS should not be ignored, as some cases can progress to invasive disease. Treatment and follow-up are tailored to individual findings. Discuss the benefits, risks and suitable options with a breast oncology specialist.
