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Thyroid Problem and Breast Cancer

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Old 09-28-2007, 02:19 PM   #1
Join Date: Sep 2004
Posts: 55
ssmith1018 HB User
Thyroid Problem and Breast Cancer

Has anyone on here associated a thyroid problem and breast cancer? My mother has invasive breast cancer. We don't know if her thyroid is bad, but labs done in February said her TSH was about 7.50. We are setting up her breast surgery for the middle of the month. Today we asked the nurse at the cancer center if they needed to know about her high TSH level. She said DEFINETLY!!! She said that during her surgery, they would check everything out. Could the thyroid problem have caused the breast cancer? Or could the breast cancer have caused the thyroid to malfunction?

Anyone with any insight on this, I would like to hear what you have to say.



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Old 09-29-2007, 03:26 AM   #2
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Join Date: Oct 2006
Location: greasy rock, tn
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accessn12 HB Useraccessn12 HB Useraccessn12 HB User
Re: Thyroid Problem and Breast Cancer

There is no known link that shows that thyroid problems can cause breast cancer. However, any serious illness can affect thyroid function. It's really important for the doctors to be aware of thyroid problems when treating a patient for anything. That high a TSH probably indicates that she does have a thyroid problem and not just an effect of her breast cancer.

My mom had breast cancer too. Two different cancers at two different times. She lost both breasts. It's been over ten years. She's doing fine.

Best of luck to both you and your mom.


Old 09-29-2007, 08:25 AM   #3
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carpediempenny HB User
Re: Thyroid Problem and Breast Cancer

Interesting. My thyroid has been all over the board for the last 4 years, especially the last 9 months my TSH has been at .002. I was just diagnosed with breast cancer this past Wednesday. The NP told us that having hormones out of whack can cause the cancer to grow faster. I have my appointment with the surgeon on Tuesday to discuss what happens next and then on Wednesday I finally get to talk to someone who knows and specializes in the female hormone system (thyroid, pituitary, hypothalimus, etc, how they all work together) I am scared and nervous but excited that maybe with all this I can finally get on the road to good health.

I didn't really answer your question but had to respond with my two cents!


Old 10-01-2007, 10:10 AM   #4
Join Date: Sep 2004
Posts: 55
ssmith1018 HB User
Re: Thyroid Problem and Breast Cancer

I did a little search on this subject after I had posted. I found that they have done a study saying that people that had breast cancer and thyroid problems, the thyroid problem usually made the breast cancer stay smaller. I thought that was interesting.

Thanks for your replies.


Old 10-01-2007, 10:40 AM   #5
Join Date: May 2007
Location: Decatur, GA, 30030
Posts: 88
Molly93 HB User
Re: Thyroid Problem and Breast Cancer

One link they did find is that women who have thyroid cancer when they are under 30 have a higher risk of Breast Cancer.. but who knows.


Old 10-01-2007, 11:07 AM   #6
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carpediempenny HB User
Re: Thyroid Problem and Breast Cancer

Guess it just depends on what hormones. Maybe not the thyroid in particular then. Still so many unknowns. I do know that I have thyroid issues and now breast cancer. lucky me.

Receptors for the female hormones estrogen and progesterone are another key personality feature of breast cancer.

If a tumor is estrogen-receptor positive (ER-positive), it is more likely to grow in a high-estrogen environment.

The hormones will tell the receptors to stimulate or "turn on" breast cell growth. Estrogen and progesterone can increase both normal and abnormal breast cell growth.

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