Whole-Brain Radiation Therapy or Stereotactic Radiosurgery With or Without Lapatinib Ditosylate in Treating Patients With Brain Metastasis From HER2-Positive Breast Cancer

Official Title

Phase II Randomized Study of Whole Brain Radiation Therapy/Stereotactic Radiosurgery in Combination With Concurrent Lapatinib in Patients With Brain Metastasis From HER2-Positive Breast Cancer: A Collaborative Study of NRG Oncology and KROG

Summary:

This randomized phase II trial studies how well whole-brain radiation therapy or stereotactic radiosurgery with or without lapatinib ditosylate works in treating patients with breast cancer that has too many of a protein called human epidermal growth factor receptor 2 (HER2) on its cells and has spread to the brain. Radiation therapy uses high energy x rays to kill tumour cells and shrink tumours. Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumour and may kill more tumour cells and cause less damage to normal tissue. Lapatinib ditosylate may stop the growth of tumour cells by blocking some of the enzymes needed for cell growth. It is not yet known whether whole-brain radiation therapy or stereotactic radiosurgery together with lapatinib ditosylate is an effective treatment for brain metastasis from breast cancer.

Trial Description

Primary Outcome:

  • CR rate in the measurable brain metastases measured by Response Evaluation Criteria in Solid Tumours (RECIST) version 1.1 based on MRI scan of the brain
Secondary Outcome:
  • CNS progressive disease outside the targeted measurable disease
  • CR rate of measurable brain metastases measured using revised RECIST version 1.1 based on MRI scan of the brain
  • Incidence of treatment-related toxicity as measured by Common Terminology Criteria for Adverse Events version 4
  • Objective response rate (ORR) (CR + PR) of measurable brain metastases measured using RECIST version 1.1 based on MRI scan of the brain
  • ORR (CR + PR) of measurable brain metastases measured using RECIST version 1.1 based on MRI scan of the brain
  • OS
  • Overall CNS complete response
  • Overall CNS progressive disease
  • Targeted lesion-specific progression
  • Targeted lesion-specific progression
PRIMARY OBJECTIVES:
I. To determine if there is a signal for an increase in complete response (CR) rate in the measurable brain metastases at 12 weeks post radiation therapy (RT) (whole brain or stereotactic radiosurgery [SRS]) as determined by magnetic-resonance imaging (MRI) scan of the brain, with the addition of lapatinib (lapatinib ditosylate) to WBRT/SRS compared to WBRT/SRS alone. SECONDARY OBJECTIVES:
I. To evaluate CR rate of the measurable brain metastases at 4 weeks post RT (WBRT/SRS) as determined by MRI scan of the brain, with the addition of lapatinib to WBRT/SRS compared to WBRT/SRS alone. II. To evaluate objective response rate of measurable brain metastases at 4 and 12 weeks post RT (WBRT/SRS) as determined by MRI scan of the brain, with the addition of lapatinib to WBRT/SRS compared to WBRT/SRS alone. III. To evaluate targeted lesion-specific objective response rate (CR + partial response [PR]) at 4 and 12 weeks post WBRT/SRS. IV. To evaluate central nervous system (CNS) progressive disease outside the targeted measurable disease with addition of lapatinib to WBRT/SRS compared to WBRT/SRS alone. V. To evaluate targeted lesion-specific progression at 4 and 12 weeks post WBRT/SRS. VI. To evaluate treatment related adverse events when adding lapatinib to WBRT/SRS compared to WBRT/SRS alone. VII. To evaluate overall CNS complete response: disappearance of all CNS target lesions sustained for at least 4 weeks; with no new lesions, no use of corticosteroids, and patient is stable or improved clinically, when adding lapatinib to WBRT/SRS compared to WBRT/SRS alone. VIII. To evaluate overall CNS progressive disease (within or outside targeted measurable disease) with addition of lapatinib to WBRT/SRS compared to WBRT/SRS alone. IX. To evaluate overall survival when adding lapatinib to WBRT/SRS compared to WBRT/SRS alone. OUTLINE:

Patients are randomized to 1 of 2 treatment arms. ARM A: Patients undergo WBRT 5 days a week for 3 weeks for a total of 15 treatments or SRS for 1 treatment. ARM B: Patients undergo WBRT or SRS as in Arm A. Patients also receive lapatinib ditosylate orally (PO) once daily (QD) for 6 weeks. After completion of study treatment, patients are followed up at 4 and 12 weeks and then every 12 weeks thereafter.

View this trial on ClinicalTrials.gov

Interested in this trial?

Print this page and take it to your doctor to discuss your eligibilty and treatment options. Only your doctor can refer you to a clinical trial.

Resources

Canadian Cancer Society

These resources are provided in partnership with the Canadian Cancer Society