6 doctors weighed in:
How does dcis turn into stage 4 breast cancer?
6 doctors weighed in

Dr. Michael Sabel
Surgery - Oncology
1 doctor agrees
In brief: Long process
While not all dcis will become invasive cancer, many cases will and to date we can not differentiate between those that will and those that won't.
Those cases that become invasive, can then spread to lymph nodes or other organs. The latter, breast cancer that spreads to other organs, is stage IV breast cancer.

In brief: Long process
While not all dcis will become invasive cancer, many cases will and to date we can not differentiate between those that will and those that won't.
Those cases that become invasive, can then spread to lymph nodes or other organs. The latter, breast cancer that spreads to other organs, is stage IV breast cancer.
Dr. Michael Sabel
Dr. Michael Sabel
Thank
Dr. Travis Kidner
Surgery - Oncology
1 doctor agrees
In brief: Pre-malignant
Dcis is a pre-malignant condition.
Meaning the cells have the potential to become cancer if left in the breast, but at their current state they are not invasive. Dcis can turn into stage 4 breast cancer if they progress to invasive cancer.

In brief: Pre-malignant
Dcis is a pre-malignant condition.
Meaning the cells have the potential to become cancer if left in the breast, but at their current state they are not invasive. Dcis can turn into stage 4 breast cancer if they progress to invasive cancer.
Dr. Travis Kidner
Dr. Travis Kidner
Thank
Dr. Barry Rosen
Surgery
1 doctor agrees
In brief: Unknown
By definition, dcis is cancer confined to the breast ducts, without the ability to spread outside the breast.
Nevertheless, rarely, a women with a history of previously-treated dcis will develop metastasis. A possible explanation is that a small invasive cancer was present but missed at the initial diagnosis. More likely, is that we just don't understand everything about dcis yet.

In brief: Unknown
By definition, dcis is cancer confined to the breast ducts, without the ability to spread outside the breast.
Nevertheless, rarely, a women with a history of previously-treated dcis will develop metastasis. A possible explanation is that a small invasive cancer was present but missed at the initial diagnosis. More likely, is that we just don't understand everything about dcis yet.
Dr. Barry Rosen
Dr. Barry Rosen
Thank
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