CIS

Squamous carcinoma in situ (CIS)

This article was last reviewed on March 9, 2020 by Jason Wasserman, MD PhD FRCPC Quick facts: Squamous carcinoma in situ (CIS) is a type of non-invasive cancer that can involve the lips, mouth, and tongue. Without treatment, patients with squamous carcinoma in situ are at high risk for developing a type of invasive cancer called …
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What does carcinoma in situ (CIS) mean?

Carcinoma in situ is a diagnosis that describes an early non-invasive type of cancer. There are many different types of carcinoma in situ and the type depends on where in the body the disease starts. Carcinoma in situ starts with a single abnormal cell. As the abnormal cell divides it creates many more abnormal cells. Eventually …
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