2023 Research Round Up: Breast Cancer, Lymphoma, Multiple Myeloma, and Brain Tumors [Video]

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The theme of the 2023 American Society of Clinical Oncology (ASCO) Annual Meeting was “Partnering With Patients: The Cornerstone of Cancer Care and Research.” From June 2 to 6 in Chicago, Illinois, and online, cancer researchers and clinicians from around the world gathered to discuss the latest cancer research and how to ensure that all people receive the cancer care they need.

In the Research Round Up series, members of the Cancer.Net Editorial Board discuss the most exciting and practice-changing research in their field presented at the meeting, and explain what it means for people with cancer. In today’s episode, our guests will discuss new research in breast cancer, lymphoma, multiple myeloma, and brain tumors.

First, Dr. Norah Lynn Henry discusses new research in early stage and metastatic breast cancer. Dr. Henry is Professor and Interim Chief of the University of Michigan’s Division of Hematology/Oncology in the Department of Internal Medicine and the Breast Oncology Disease Lead at the Rogel Cancer Center. She is also the 2023 Cancer.Net Associate Editor for Breast Cancer.

You can view Dr. Henry’s disclosures at Cancer.Net.

Dr. Henry: Hi, I’m Dr. Lynn Henry, a breast cancer oncologist from the University of Michigan Rogel Cancer Center. Welcome to this quick summary of the most exciting new research in breast cancer that was presented at the 2023 ASCO Annual Meeting. I have no conflicts of interest for any of the trials that I will talk about. First, I’m going to give a very brief overview of the types of breast cancer, then talk about some research that was presented on both early-stage and metastatic breast cancer. As a reminder, there are multiple kinds of breast cancer. Some breast cancers are called hormone receptor-positive or estrogen receptor-positive and are stimulated to grow by the hormone estrogen. We treat those cancers with anti-estrogen or anti-endocrine treatments, which block estrogen or lower estrogen levels. Other breast cancers are called HER2-positive. These are often more aggressive cancers. But because they have extra copies of HER2, they often respond to treatments that block HER2. Finally, there are breast cancers that don’t have hormone receptors or HER2. These are called triple-negative breast cancer and are also often aggressive cancers. Most of the results I’m going to highlight today are treatments for estrogen receptor-positive and HER2-negative breast cancer. One of the main stories from the ASCO Annual Meeting was the result of the NATALEE trial. At the present time, for patients with estrogen receptor-positive, HER2-negative early-stage breast cancer who were at high risk of having their breast cancer come back, the currently recommended treatment is anti-endocrine therapy. Based on the results of a prior trial called monarchE, we also consider adding a medicine called abemaciclib, which turns off some enzymes in the cell that are called CDK4 and CDK6, which are known to make estrogen receptor-positive breast cancer cells grow. Abemaciclib can further reduce the risk of cancer recurrence compared to endocrine therapy alone, but it does have some side effects, most commonly, diarrhea.

In the NATALEE trial, which was presented for the first time at this ASCO meeting, researchers studied a similar type of medication called ribociclib. It acts similarly to abemaciclib, although it is more likely to cause low blood counts and less likely to cause diarrhea. Ribociclib is currently routinely used in combination with anti-endocrine therapy to treat patients with metastatic estrogen receptor-positive breast cancer but is not yet routinely used in the early-stage setting. In the NATALEE trial, patients with estrogen receptor-positive, HER2-negative early-stage breast cancer who are at high risk of breast cancer recurrence were enrolled. Half the patients were treated with just standard anti-endocrine therapy and half also received ribociclib for 3 years. After the 3-year treatment period, those who received both ribociclib and anti-endocrine therapy were about 25% less likely to have their cancer come back compared to those who received only anti-endocrine therapy. Overall, the m…