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breast cancer

Research

Treatment

Source: Breast Cancer Research and Treatment

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  • Published: Jan 18, 2019
  • Added to your feed: Feb 20, 2019
  • Added by Medivizor: Feb 20, 2019
  • Updated by Medivizor: Feb 20, 2019
  • Risk of blood clots in breast cancer patients treated with aromatase inhibitors or tamoxifen

    In a nutshell

    This study wanted to find out if the risk of patients with breast cancer developing a blood clot was higher if they were treated with aromatase inhibitors, or tamoxifen (Nolvadex). The study found that the patients treated with tamoxifen had a higher risk of developing blood clots compared to those treated with aromatase inhibitors. 

    Some background

    A side effect of long-term cancer treatment is that blood clots can form. These form in the deep veins in places like the legs, groin, and armpit. These blood clots can be very dangerous if they travel through the body to the heart. Aromatase inhibitors are a type of anti-cancer treatment that works on hormone receptor positive cancer. This means that the cancer cells have receptors for certain hormones on their surface. By using an aromatase inhibitor, these receptors are targeted and the cancer cells can be killed. Tamoxifen works in the same way. It is not known if there is a higher risk of blood clots forming when patients are treated with tamoxifen, compared to if they are treated with aromatase inhibitors. 

    Methods & findings

    This study consisted of 12904 women with breast cancer. All of these women underwent treatment with either tamoxifen, or an aromatase inhibitor. Of these, 623 had a blood clot event happen. The patients were followed for an average of 5.4 years. 

    Overall, the patients who were treated with aromatase inhibitors were 41% less likely to have a blood clot. The risk of having a blood clot was also lower for patients who were treated with aromatase inhibitors, and had another form of chemotherapy at the same time. 

    The bottom line

    The study concluded that the risk of blood clots is lower in patients treated with aromatase inhibitors compared to those treated with tamoxifen. 

    The fine print

    This is a very big study with lots of data. The results are likely to be accurate. 

    What's next?

    Talk to your oncologist about your treatment plan. 

    Disclaimer:
    This information should not be relied upon as a substitute for personal medical advice, diagnosis or treatment. Use the information provided by Medivizor solely at your own risk. Medivizor makes no warranties or representations as to the accuracy of information provided herein. If you have any concerns about your health, please consult a physician.

    Discussion about this item

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    1. Cherry Feb 20, 2019

      I stopped taking them. Reply

    2. Anonymous Feb 20, 2019

      What drugs are considered aromatase inhibitors? Reply

      • Traveltext Feb 21, 2019

        Femara is an AI. Otherwise known as letrozole. Reply

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