Ductal Carcinoma In Situ (DCIS)

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What is Ductal Carcinoma In Situ?

Ductal carcinoma in situ (DCIS) is a non-invasive cancer where abnormal cells have been found in the lining of the breast milk duct. The atypical cells have not spread outside of the ducts into the surrounding breast tissue. Ductal carcinoma in situ is very early cancer that is highly treatable, but if it’s left untreated or undetected, it can spread into the surrounding breast tissue.

What does the term, “in situ” mean?

The earliest stages of cancers are called “carcinoma in situ.” Carcinoma means “cancer” and in situ means “in the original place.”