Research shows that the risk of getting invasive cancer is low if you’ve been treated for DCIS. If it isn’t treated, 30% to 50% of women with DCIS will get invasive cancer.

What percentage of DCIS becomes invasive?

The largest studies on the natural history of DCIS suggest that more than 50% of patients with high-grade DCIS have the potential to progress to an invasive carcinoma in less than 5 years if left untreated, while low-grade DCIS has a similar progression but in a small percentage of patients (35–50%) and in a more …

Is invasive ductal carcinoma most common?

Invasive (or infiltrating) breast cancer has spread into surrounding breast tissue. The most common types are invasive ductal carcinoma and invasive lobular carcinoma. Invasive ductal carcinoma makes up about 70-80% of all breast cancers.