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Topic: Anyone have 2 stages of breast cancer on both breasts

Forum: Mixed Type Breast Cancer — Meet others who have mixed type breast cancer.

Posted on: May 15, 2021 05:38PM - edited May 31, 2021 07:00AM by My-Lan28

My-Lan28 wrote:

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May 15, 2021 09:16PM Beesie wrote:

My-Lan,

The way staging is done in North America (and Europe, I believe), with your diagnosis you would not be considered to have two stages of breast cancer in each breast.

Most IDC develops from DCIS, so it's very common to have DCIS and IDC together in one breast. In fact about 80% of IDC diagnoses include some DCIS. Because the IDC is the more serious condition, the staging and treatment plan is based on the IDC - the DCIS needs to be surgically removed but it does not count in the staging.

While DCIS is Stage 0 breast cancer, this staging only applies when the entire diagnosis is pure DCIS, with no invasive cancer also found. So in your case, because you have invasive cancer, the DCIS is ignored in the staging and your staging would be Stage IB for your left breast and Stage IA for your right breast.

(As a side note, for those who complete their personal profiles on this website, the diagnosis inputs allows people to separately stage DCIS and IDC within a single diagnosis. This is not correct. )


Dx 9/15/2005 Right, 7cm+, DCIS-Mi, Stage IA, Gr 3, 0/3 nodes, ER+/PR- ** Dx 01/16/2019 Left, 8mm, IDC, Stage IA, Gr 2, 0/3 nodes, ER+/PR-, HER2- (FISH) ** Surgery 11/30/2005 MX Right, 03/06/2019 MX Left ** Hormonal Therapy 05/2019 Letrozole
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May 16, 2021 11:42AM - edited May 16, 2021 02:48PM by exbrnxgrl

my-lan,

I agree with beesie's comments. I do understand you’re asking about this because when I was dx'ed I had (literally) no idea that there were different types of bc. I also had DCIS along with my IDC and thought I was a bc overachiever 🤷🏻♀️. As Beesie noted this is very, very common. Take care.

Bilateral mx 9/7/11 with one step ns reconstruction. As of 11/21/11, 2cm met to upper left femur Dx 7/8/2011, IDC, Left, 4cm, Grade 1, 1/15 nodes, mets, ER+/PR+, HER2- Surgery 9/7/2011 Lymph node removal: Left; Mastectomy: Left, Right; Reconstruction (left); Reconstruction (right) Dx 11/2011, IDC, Left, 4cm, Stage IV, Grade 1, 1/15 nodes, mets, ER+/PR+, HER2- Hormonal Therapy 11/21/2011 Arimidex (anastrozole) Radiation Therapy 11/21/2011 Bone Hormonal Therapy 6/19/2014 Femara (letrozole) Hormonal Therapy Aromasin (exemestane)

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