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TOPLINE:

A rapid recommendation update from the American Society of Clinical Oncology (ASCO) offers guidance on use of cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors, abemaciclib and ribociclib, for the adjuvant treatment of stage II and III breast cancer.

METHODOLOGY:

  • The guideline update was needed to incorporate new high-quality evidence for the adjuvant use of CDK4/6 inhibitors in early breast cancer.
  • The ASCO guideline expert panel reviewed evidence from phase 3 trials, including the monarchE and NATALEE studies, focusing on the efficacy of abemaciclib and ribociclib in improving invasive disease-free survival (IDFS) and distant disease-free survival (DDFS).

TAKEAWAY:

  • Abemaciclib for 2 years plus endocrine therapy (ET) for at least 5 years is recommended for patients with resected, hormone receptor–positive, HER2-negative, node-positive early breast cancer at high risk of recurrence, including those with at least four positive axillary lymph nodes (ALNs) or one to three positive ALNs plus additional high-risk features.
  • Ribociclib (400 mg once daily, 3 weeks on, 1 week off) for 3 years plus ET is recommended for patients with stage II or III breast cancer who have a high risk of recurrence, based on the NATALEE trial.
  • For patients meeting both monarchE and NATALEE criteria, abemaciclib is preferred due to longer follow-up, a deepening benefit over time, and FDA approval in the adjuvant setting.
  • Ribociclib is recommended for patients who cannot tolerate abemaciclib due to contraindications such as high-grade diarrhea.
  • Benefits, risks, costs, and individual patient preferences should be considered when deciding on adjuvant CDK4/6 inhibitor therapy.

IN PRACTICE:

This rapid recommendation update addresses the adjuvant use of CDK4/6 inhibitors abemaciclib and ribociclib in patients with stage II and III breast cancer.

SOURCE:

The clinical practice guideline update, led by Rachel A. Freedman, from Dana-Farber Cancer Institute, Boston, was published in the Journal of Clinical Oncology.

LIMITATIONS:

The guideline panelists noted that the clinical benefits of adjuvant CDK4/6 inhibitor therapy may not extend to all patients eligible for the trials, particularly those at lower risk. There are insufficient data to specify which subgroups of patients may not warrant therapy, emphasizing the need for individualized treatment decisions. More data are needed to provide long-term efficacy data and more detailed guidance on which specific patient populations will benefit most from adjuvant CDK4/6 inhibitor therapy.

DISCLOSURES:

Guideline development was funded by the American Society of Clinical Oncology (ASCO). The panelists disclosed relationships with Firefly Health, Eisai, Novartis, and others.

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TOPLINE:

A rapid recommendation update from the American Society of Clinical Oncology (ASCO) offers guidance on use of cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors, abemaciclib and ribociclib, for the adjuvant treatment of stage II and III breast cancer.

METHODOLOGY:

  • The guideline update was needed to incorporate new high-quality evidence for the adjuvant use of CDK4/6 inhibitors in early breast cancer.
  • The ASCO guideline expert panel reviewed evidence from phase 3 trials, including the monarchE and NATALEE studies, focusing on the efficacy of abemaciclib and ribociclib in improving invasive disease-free survival (IDFS) and distant disease-free survival (DDFS).

TAKEAWAY:

  • Abemaciclib for 2 years plus endocrine therapy (ET) for at least 5 years is recommended for patients with resected, hormone receptor–positive, HER2-negative, node-positive early breast cancer at high risk of recurrence, including those with at least four positive axillary lymph nodes (ALNs) or one to three positive ALNs plus additional high-risk features.
  • Ribociclib (400 mg once daily, 3 weeks on, 1 week off) for 3 years plus ET is recommended for patients with stage II or III breast cancer who have a high risk of recurrence, based on the NATALEE trial.
  • For patients meeting both monarchE and NATALEE criteria, abemaciclib is preferred due to longer follow-up, a deepening benefit over time, and FDA approval in the adjuvant setting.
  • Ribociclib is recommended for patients who cannot tolerate abemaciclib due to contraindications such as high-grade diarrhea.
  • Benefits, risks, costs, and individual patient preferences should be considered when deciding on adjuvant CDK4/6 inhibitor therapy.

IN PRACTICE:

This rapid recommendation update addresses the adjuvant use of CDK4/6 inhibitors abemaciclib and ribociclib in patients with stage II and III breast cancer.

SOURCE:

The clinical practice guideline update, led by Rachel A. Freedman, from Dana-Farber Cancer Institute, Boston, was published in the Journal of Clinical Oncology.

LIMITATIONS:

The guideline panelists noted that the clinical benefits of adjuvant CDK4/6 inhibitor therapy may not extend to all patients eligible for the trials, particularly those at lower risk. There are insufficient data to specify which subgroups of patients may not warrant therapy, emphasizing the need for individualized treatment decisions. More data are needed to provide long-term efficacy data and more detailed guidance on which specific patient populations will benefit most from adjuvant CDK4/6 inhibitor therapy.

DISCLOSURES:

Guideline development was funded by the American Society of Clinical Oncology (ASCO). The panelists disclosed relationships with Firefly Health, Eisai, Novartis, and others.

 

TOPLINE:

A rapid recommendation update from the American Society of Clinical Oncology (ASCO) offers guidance on use of cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors, abemaciclib and ribociclib, for the adjuvant treatment of stage II and III breast cancer.

METHODOLOGY:

  • The guideline update was needed to incorporate new high-quality evidence for the adjuvant use of CDK4/6 inhibitors in early breast cancer.
  • The ASCO guideline expert panel reviewed evidence from phase 3 trials, including the monarchE and NATALEE studies, focusing on the efficacy of abemaciclib and ribociclib in improving invasive disease-free survival (IDFS) and distant disease-free survival (DDFS).

TAKEAWAY:

  • Abemaciclib for 2 years plus endocrine therapy (ET) for at least 5 years is recommended for patients with resected, hormone receptor–positive, HER2-negative, node-positive early breast cancer at high risk of recurrence, including those with at least four positive axillary lymph nodes (ALNs) or one to three positive ALNs plus additional high-risk features.
  • Ribociclib (400 mg once daily, 3 weeks on, 1 week off) for 3 years plus ET is recommended for patients with stage II or III breast cancer who have a high risk of recurrence, based on the NATALEE trial.
  • For patients meeting both monarchE and NATALEE criteria, abemaciclib is preferred due to longer follow-up, a deepening benefit over time, and FDA approval in the adjuvant setting.
  • Ribociclib is recommended for patients who cannot tolerate abemaciclib due to contraindications such as high-grade diarrhea.
  • Benefits, risks, costs, and individual patient preferences should be considered when deciding on adjuvant CDK4/6 inhibitor therapy.

IN PRACTICE:

This rapid recommendation update addresses the adjuvant use of CDK4/6 inhibitors abemaciclib and ribociclib in patients with stage II and III breast cancer.

SOURCE:

The clinical practice guideline update, led by Rachel A. Freedman, from Dana-Farber Cancer Institute, Boston, was published in the Journal of Clinical Oncology.

LIMITATIONS:

The guideline panelists noted that the clinical benefits of adjuvant CDK4/6 inhibitor therapy may not extend to all patients eligible for the trials, particularly those at lower risk. There are insufficient data to specify which subgroups of patients may not warrant therapy, emphasizing the need for individualized treatment decisions. More data are needed to provide long-term efficacy data and more detailed guidance on which specific patient populations will benefit most from adjuvant CDK4/6 inhibitor therapy.

DISCLOSURES:

Guideline development was funded by the American Society of Clinical Oncology (ASCO). The panelists disclosed relationships with Firefly Health, Eisai, Novartis, and others.

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