Will CDK4/6 inhibitors help in advanced metastatic BC?

Question

Hi doctor,

I am 52 years old and was diagnosed with breast cancer three years ago. I underwent surgery, chemotherapy, and radiation. The cancer was ER-positive and HER2-negative. Unfortunately, it has now spread to my liver and bones.

I am currently on hormone therapy, but I am experiencing severe pain in my back and hips. I feel weak and fatigued all the time. My doctor mentioned CDK4/6 inhibitors as the next step in my treatment.

Will this really help at such an advanced stage?
Additionally, how long do people typically live with metastatic breast cancer?

Please guide.

Answer 1

Hi,

Welcome to icliniq.com.

I read your query and understand your concerns.

I am really sorry you are going through this. Since your breast cancer is ER-positive (estrogen receptors) and HER2-negative (epidermal growth factor receptor 2), adding a CDK4/6 (cyclin-dependent kinases 4 and 6) inhibitor to hormone therapy is now considered one of the most effective treatments for metastatic disease.

These medicines, such as Palbociclib, Ribociclib, or Abemaciclib, work by slowing cancer cell growth and can significantly improve survival and quality of life compared to hormone therapy alone.

Many patients respond well for years, with reduced pain and better control of the disease in the liver and bones.

Of course, side effects like low blood counts, fatigue, or diarrhea can occur, but they are usually manageable with dose adjustments and supportive care.

Regarding survival, metastatic breast cancer is not considered curable, but treatment has advanced a lot in recent years.

On average, women with ER-positive, HER2-negative metastatic breast cancer live several years after diagnosis, and some live much longer, especially if they respond well to modern therapies.

It is very individual, depending on how the cancer behaves, your overall health, and how well the treatments control symptoms. The goal is to keep the disease under control, manage pain, and help you maintain strength and quality of life.

If your pain is severe, you should consider palliative radiation to bone spots or better pain management options so you feel more comfortable while starting the subsequent treatment.

I hope this answers your query. Feel free to reach out anytime.

Thank you.