52 min
Highlights from SABCS 2020: New data on CDK4/6 inhibitors, omitting chemotherapy and radiotherapy, underreporting toxicity, and predicting outcomes in breast cancer Blood & Cancer
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- Medicine
A number of groundbreaking and practice-changing studies were presented at the San Antonio Breast Cancer Symposium 2020.
The RxPONDER, ADAPT, and PRIME-2 trials revealed patients who can forgo chemotherapy or radiotherapy, monarchE and PENELOPE-B showed conflicting results with CDK4/6 inhibitors, one study indicated that a new tool can guide adjuvant chemotherapy, and another study suggested that circulating tumor cells (CTCs) can predict overall survival (OS).
Alan P. Lyss, MD, subprincipal investigator for Heartland Cancer Research NCORP, joined host David H. Henry, MD, to discuss these and other studies — their top 10 presentations from SABCS 2020 — in this episode.
1. Abstract GS3-07. Identifying patients whose symptoms are under-recognized during breast radiotherapy: Comparison of patient and physician reports of toxicity in a multicenter cohort. https://bit.ly/2MGCVEH
This presentation could be one of the most important stories to emerge from SABCS 2020, according to Dr. Lyss. The trial included 9,868 breast cancer patients who received radiotherapy over an 8-year period. Investigators compared patient and physician reports of toxicity during radiotherapy, assessing four symptoms: pain, pruritus, edema, and fatigue. Physicians under-recognized moderate to severe pain 30.9% of the time, pruritus 36.7% of the time, edema 51.4% of the time, and fatigue 18.8% of the time. “The bottom line is: We’ve got to do better at this, and the first step in correcting it is to acknowledge that there is a problem. This abstract established that,” Dr. Lyss said.
2. Abstract GS2-03. Prime 2 randomised trial (postoperative radiotherapy in minimum-risk elderly): Wide local excision and adjuvant hormonal therapy +/- whole breast irradiation in women =/> 65 years with early invasive breast cancer: 10-year results. https://bit.ly/3omINAL
The trial enrolled 1,326 women with histologically confirmed, unilateral invasive, hormone receptor-positive (HR+) breast cancer who were all 65 or older, had a tumor measuring 3 cm or less, had no nodal involvement, and were about to undergo breast-conserving surgery. The women were randomized 1:1 to receive adjuvant whole-breast irradiation or no radiotherapy in addition to adjuvant endocrine therapy. At 10 years, the rate of ipsilateral recurrence was significantly lower with radiotherapy than without it (0.9% vs 9.8%, P = .00008). The 10-year rate of regional recurrence was significantly lower with radiotherapy as well (0.5% vs. 2.3%, P = .014). There was no significant difference in the radiotherapy and no-radiotherapy arms when it came to distant recurrence (3.6% vs. 1.9%, P = .07), contralateral recurrence (2.2% vs. 1.2%, P = .20), non–breast cancer (8.7% vs. 10.2%, P = .41), metastasis-free survival (96.4% vs. 98.1%, P = .28), or OS (81.0% vs. 80.4%, P = .68). These results suggest radiotherapy could be omitted in this patient population, but the decision should be discussed and tailored to the individual patient, according to Dr. Henry.
3. Abstract GS1-01. Primary outcome analysis of invasive disease-free survival for monarchE: abemaciclib combined with adjuvant endocrine therapy for high-risk early breast cancer. https://bit.ly/38oSHwt
The monarchE trial enrolled 5,637 women with HR+, HER2- early breast cancer. Cohort 1 included patients with four or more positive nodes, up to three positive nodes and a tumor size ≥ 5 cm, or grade 3 disease. Cohort 2 included women with up to three positive nodes and a Ki-67 index ≥ 20%. Patients in both cohorts were randomized to standard endocrine therapy alone or standard endocrine therapy with abemaciclib. The 2-year rate of invasive disease-free survival (IDFS) was 92.3% in the abemaciclib arm and 89.3% in the control arm (P = .0009). The 2-year distant relapse-free survival rate was 93.8% and 90.8%, respectively (P = .0009). Dr. Lyss said this is the first real advance in HR+ breast cancer adjuvant treatment in many ye
A number of groundbreaking and practice-changing studies were presented at the San Antonio Breast Cancer Symposium 2020.
The RxPONDER, ADAPT, and PRIME-2 trials revealed patients who can forgo chemotherapy or radiotherapy, monarchE and PENELOPE-B showed conflicting results with CDK4/6 inhibitors, one study indicated that a new tool can guide adjuvant chemotherapy, and another study suggested that circulating tumor cells (CTCs) can predict overall survival (OS).
Alan P. Lyss, MD, subprincipal investigator for Heartland Cancer Research NCORP, joined host David H. Henry, MD, to discuss these and other studies — their top 10 presentations from SABCS 2020 — in this episode.
1. Abstract GS3-07. Identifying patients whose symptoms are under-recognized during breast radiotherapy: Comparison of patient and physician reports of toxicity in a multicenter cohort. https://bit.ly/2MGCVEH
This presentation could be one of the most important stories to emerge from SABCS 2020, according to Dr. Lyss. The trial included 9,868 breast cancer patients who received radiotherapy over an 8-year period. Investigators compared patient and physician reports of toxicity during radiotherapy, assessing four symptoms: pain, pruritus, edema, and fatigue. Physicians under-recognized moderate to severe pain 30.9% of the time, pruritus 36.7% of the time, edema 51.4% of the time, and fatigue 18.8% of the time. “The bottom line is: We’ve got to do better at this, and the first step in correcting it is to acknowledge that there is a problem. This abstract established that,” Dr. Lyss said.
2. Abstract GS2-03. Prime 2 randomised trial (postoperative radiotherapy in minimum-risk elderly): Wide local excision and adjuvant hormonal therapy +/- whole breast irradiation in women =/> 65 years with early invasive breast cancer: 10-year results. https://bit.ly/3omINAL
The trial enrolled 1,326 women with histologically confirmed, unilateral invasive, hormone receptor-positive (HR+) breast cancer who were all 65 or older, had a tumor measuring 3 cm or less, had no nodal involvement, and were about to undergo breast-conserving surgery. The women were randomized 1:1 to receive adjuvant whole-breast irradiation or no radiotherapy in addition to adjuvant endocrine therapy. At 10 years, the rate of ipsilateral recurrence was significantly lower with radiotherapy than without it (0.9% vs 9.8%, P = .00008). The 10-year rate of regional recurrence was significantly lower with radiotherapy as well (0.5% vs. 2.3%, P = .014). There was no significant difference in the radiotherapy and no-radiotherapy arms when it came to distant recurrence (3.6% vs. 1.9%, P = .07), contralateral recurrence (2.2% vs. 1.2%, P = .20), non–breast cancer (8.7% vs. 10.2%, P = .41), metastasis-free survival (96.4% vs. 98.1%, P = .28), or OS (81.0% vs. 80.4%, P = .68). These results suggest radiotherapy could be omitted in this patient population, but the decision should be discussed and tailored to the individual patient, according to Dr. Henry.
3. Abstract GS1-01. Primary outcome analysis of invasive disease-free survival for monarchE: abemaciclib combined with adjuvant endocrine therapy for high-risk early breast cancer. https://bit.ly/38oSHwt
The monarchE trial enrolled 5,637 women with HR+, HER2- early breast cancer. Cohort 1 included patients with four or more positive nodes, up to three positive nodes and a tumor size ≥ 5 cm, or grade 3 disease. Cohort 2 included women with up to three positive nodes and a Ki-67 index ≥ 20%. Patients in both cohorts were randomized to standard endocrine therapy alone or standard endocrine therapy with abemaciclib. The 2-year rate of invasive disease-free survival (IDFS) was 92.3% in the abemaciclib arm and 89.3% in the control arm (P = .0009). The 2-year distant relapse-free survival rate was 93.8% and 90.8%, respectively (P = .0009). Dr. Lyss said this is the first real advance in HR+ breast cancer adjuvant treatment in many ye
52 min