What is ER-Low Breast Cancer?

Pathology examination Did you know that some breast cancers can be defined as estrogen receptor low (ER-low) breast cancer?

When you’re first diagnosed, a pathologist runs a series of lab tests on the cancer cells to see what drives the breast cancer to grow. Estrogen receptor positive (ER positive) breast cancer cells have proteins that respond to signals from estrogen, telling the cells to grow. Your pathology report will tell you whether the cancer is ER positive, and how many cells in the tumor sample had estrogen receptors.

Right now, any breast cancer with at least 1% of tested cells showing estrogen receptors is considered ER positive. But researchers have found that ER positive cancers that have a low number of cells with estrogen receptors may respond differently to treatment. These breast cancers are called ER-low.

To learn more about reading your test results, understanding ER-low, and what current guidelines are for treating estrogen receptor low breast cancer, see below.

What Do My Test Results Mean?
What Do Current Guidelines Say?
Should ER Low Breast Cancers Be Treated With Hormonal Therapy?
What Are The Treatment Options for ER-Low Breast Cancer?
  • TNBC Clinical Trials For ER-Low Breast Cancer Breast cancers that have any number of estrogen receptors, including those defined as ER-low, are currently treated with hormonal therapies. But some clinical trials for triple negative breast cancer (TNBC) accept people with ER-low cancers. See trials on Metastatic Trial Search that are accepting participants who qualify as ER-low.
  • Clinical Trials for ER Positive Breast Cancer People with ER-low breast cancer may also qualify for clinical trials for estrogen positive (ER+) breast cancer. See clinical trials for estrogen positive breast cancer on Metastatic Trial Search.

Spotlight on Metastatic Breast Cancer in Older People

A female doctor talking to senior patient in bed in hospital.Geriatric oncology is a specialty that focuses on treating and researching cancer in older people. As we age, our bodies are more likely to develop many different kinds of health issues, from high blood pressure and arthritis to heart disease.

Treating metastatic breast cancer in older patients can mean balancing the side effects of MBC treatments with other illnesses and the medicines needed to manage them.

FDA Approves PHESGO

In late June, the FDA approved PHESGO (pertuzumab/ trastuzumab/ hyaluronidase-zzxf), a treatment that can be injected under the skin, to treat metastatic and early-stage HER2 positive breast cancer. Because it is given as an injection, PHESGO can be given by a healthcare professional in your home, and takes less time than an infusion.

FDA Approves PHESGO for Treatment of Patients With HER2-Positive Breast Cancer Approximately Four Months Ahead of Schedule

 

HER2 Positive Metastatic Breast Cancer Research Update

The treatment landscape for HER2 positive metastatic breast cancer has been rapidly evolving. Since February, the FDA has approved three new drugs to treat it: neratinib, tucatinib, and trastuzumab deruxtecan. More continue to look promising in clinical trials. Targeted therapies’ drugs that can attach to certain features of cancer cells have created more research avenues and may potentially lead to more treatment options.

To learn more about what it means to be HER2 positive, how the subtype is typically treated, the latest news in research, and what might be coming down the line, check out the information below.

What Does HER2 Positive Mean?
  • Breast Cancer HER2 Status  The American Cancer Society describes, in simple terms, what HER2 positive means and what test doctors use to determine whether a tumor is HER2 positive or HER2 negative.
How HER2 Positive is Typically Treated 
What’s New in HER2 Positive MBC
What’s in the Pipeline?
  • Emerging Areas in Metastatic Breast Cancer Treatment  Susan G. Komen breaks down treatments on the rise and under study for metastatic breast cancer. For HER2 positive disease, the most helpful sections are HER2 Targeted Therapies, HER2 antibody drug conjugates, and Tyrosine kinase inhibitors.
  • Clinical Trials for HER2 Positive MBC Metastatic Trial Search provides a list of over 100 clinical trials for people with HER2 positive metastatic breast cancer.

See all articles on this site tagged with HER2 Positive breast cancer

Peer Support for Metastatic Breast Cancer

Peer support can be an important part of coping with major illnesses like metastatic breast cancer. Rather than talk to a professional like a counselor or therapist, you speak with one or more people who are also living with metastatic disease. Peer support can be found in-person, by phone or online.

What Types of Peer Support Are Available?

  • Models of Peer Support Peers for Progress defines different kinds of peer support. Peers for Progress is not cancer specific, but the models explained apply to peer support for cancer.

Is Peer Support for Me?

Where Can I Find Support? 

  • Finding Support This list from our August 2018 issue of Metastatic Trial Talk provides links to organizations that offer support for people with MBC.

How to Find Metastatic Breast Cancer Clinical Trials

You’ve decided to look into clinical trials as part of your treatment plan but how do you find one, and how do you know if it’s right for you?

Searching for clinical trials can be daunting, but there are resources available to help you. One way to find a trial is to talk to your healthcare team. You can also search for trials online using a clinical trial matching service, which uses information about your diagnosis entered into an online form, to find trials that fit your profile. Metastatic Trial Search (MTS), a companion to Metastatic Trial Talk, is a matching service designed specifically for people with metastatic breast cancer. MTS was developed by BreastCancerTrials.org, in collaboration with five breast cancer advocacy groups. It is available on the websites of over 20 breast cancer organizations.

To learn more about BreastCancerTrials.org, Metastatic Trial Search (MTS), and how to use a clinical trial matching service, see below.

Talking to Your Doctor 

Searching Online 

  • Metastatic Trial Search Provides personalized clinical trial matching based on your specific MBC diagnosis. Ability to filter on location, clinical trial phases, types (e.g. targeted therapy, immunotherapy), genomic mutations, and more.
  • BreastCancerTrials.org Enables you to browse all breast cancer clinical trials, as well as match to trials using diagnosis and treatment history information. BCT is for all stages of breast cancer, including MBC.
  • The Storm Riders Developed by patient advocate Christine Hodgdon for finding MBC trials, this list includes all trials that are enrolling patients with any type of solid tumor.
  • How Do I Find a Clinical Trial That’s Right for Me? The American Cancer Society explains how to search for trials, what clinical trial matching services are, how they work, and things to consider when choosing which service to use.
  • Steps to Find a Clinical Trial The National Cancer Institute put together this step-by-step guide to help you find clinical trials on your own. It has useful information on what you’ll need, details to look for, and questions to ask along the way.

Introduction to MBC Clinical Trials

The idea of finding and participating in a clinical trial can seem daunting. We are here to help. Read here about clinical trials, how they work, why they are important, and how to find a trial that may be right for you.