What is invasive breast cancer versus noninvasive breast cancer? Noninvasive cancer means the abnormal cells are contained in the milk ducts of the breast and lack the ability to spread to surrounding tissue or elsewhere in the body. Invasive breast cancer means the cancer has grown beyond its original location into surrounding normal breast tissue and has the potential to spread to other parts of the body. What is ductal carcinoma in situ? Ductal carcinoma in situ (DCIS) is a very early form of breast cancer that's confined to the milk ducts, which is why it's called “ductal.” “Carcinoma” is the name for any cancer that begins in cells that line the inner or outer surfaces of tissues, such as the breast ducts. “In situ” is a Latin term meaning “in its original place.” DCIS is the most common form of noninvasive breast cancer. DCIS is classified as low, intermediate, or high grade. Grades are based on what the cells look like under a microscope. The lower the grade, the more closely DCIS resembles normal breast cells. The higher the grade, the more different it is from normal cells. DCIS can sometimes involve the nipple, causing it to look red and scaly. This is a rare form of cancer known as Paget's disease of the breast (named after the doctor who first described it). [msk-node-video: 128200 right] In some women, DCIS may not progress to invasive cancer in their lifetime. This has fueled debate about DCIS about whether... 更多資訊
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