Ki 67

I don't believe they do a ki67 on dcis. Your regime will be offered based on your invasive cancer. But your oncologist can go through this with you if you ask specifically.

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Yes the Ki67 is the rate that the cancer is dividing. So I am presuming it is how they determine the grade of the cancer. 

The grade or ki67 rate helps determine how it responds to chemo. The higher the rate the better it's response as chemo destroys rapidly dividing cells. 

So that is why some ladies only have hormone treatment as it is less likely to respond to chemo but does well to be starved of it's source. 

I had a her2 cancer so my rate was very high. That is the nature of her2 cancers.

Hope this helps.  Kath x

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Hi Joannie

There seem to be many wise women on here who I suspect would say ask your Surgeon so that you get the correct answer and I think that is really good, sage advice.

That said my understanding (as I asked my surgeon the same thing) is that it is only ONE of several factors they take into account when deciding what is the best treatment for you. They do not rely on any one single factor in isolation but rather evaluation of treatment options is based on a constellation of factors. Ki 67 is, as I understand it (and I am not a doctor), a measure of how how fast the cancer cells are proliferating, lower rates being better. You would have to ask your doctor about what is low and high.

Notably, my KI67 result following my core biopsy was much higher than what it was after my lumpectomy. My understanding is the latter result is more reliable.

Good luck and trust in your team.

@primek can help I think!