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Deferring radiotherapy to administer epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) first doesn’t prolong overall survival, it shortens survival in patients who have brain metastases of EGFR-mutated non–small-cell lung cancer (NSCLC), according to a report in the Journal of Clinical Oncology.
Upfront therapy using EGFR TKIs such as erlotinib has been proposed as a way to avoid radiotherapy altogether in this patient population, or to at least defer it and any related toxicities until intracranial disease progresses, said William J. Magnuson, MD, of Yale University, New Haven, Conn., and his associates.
To assess the advantages and disadvantages of upfront EGFR TKIs vs. initial radiotherapy, the researchers pooled survival data for 351 patients treated at six academic medical centers during 2008-2015. A total of 131 (37%) received upfront EGFR TKIs followed by stereotactic radiosurgery or whole-brain radiotherapy when the brain metastases progressed, 120 (34%) received whole-brain radiotherapy followed by EGFR TKIs, and 100 (29%) received stereotactic radiosurgery followed by EGFR TKIs. These patients were followed for a median of 22 months.
Median overall survival was 25 months for upfront EGFR TKIs, compared with 30 months for initial whole-brain radiotherapy and 46 months for initial stereotactic radiosurgery. At 2 years, overall survival rates for the three study groups were 51%, 62%, and 78%, respectively. Both forms of initial radiotherapy were associated with improved overall survival relative to EGFR TKIs, with a hazard ratio of 0.39 for stereotactic radiosurgery and a hazard ratio of 0.70 for whole-brain irradiation.
This survival advantage was even more pronounced in the subgroup of patients who had more favorable prognostic features at baseline. These patients had a median overall survival of 64 months if they received radiotherapy followed by EGFR TKIs, compared with only 32 months if EGFR TKIs were taken before radiotherapy, the investigators said (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.69.7144).
These findings have the potential to change clinical practice, but prospective randomized data to confirm the results are urgently needed. “Until such a study is conducted and published, the standard-of-care treatment of newly diagnosed brain metastases should remain stereotactic radiosurgery followed by systemic therapy,” Dr. Magnuson and his associates said.
No funding source was cited for this study. Dr. Magnuson reported having no relevant financial disclosures; his associates reported having ties to numerous industry sources.
The findings of Magnuson et al. suggest that initial brain radiotherapy, especially stereotactic radiosurgery, is critical for patients who have EGFR-mutated NSCLC with brain metastases.
However, prospective studies are needed to confirm these results, and outcomes other than survival – including quality of life and neurocognitive function – must be addressed. The authors were unable to assess these outcomes in their pooled retrospective analysis.
In addition, potentially synergetic cognitive toxicities caused by combined or sequential therapies are still unclear, and are especially important for patients who do achieve long-term survival.
Lin Zhou, MD, and associates are at West China Hospital and Sichuan University, Chengdu, China. Dr. Zhou reported having no relevant financial disclosures; one of Dr. Zhou’s associates reported having ties to AstraZeneca. Hoffman-La Roche, Eli Lilly, Pfizer, Elekta, and Varian Medical Systems. Dr. Zhou and associates made these remarks in an editorial accompanying Dr. Magnuson’s report (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.71.5706).
The findings of Magnuson et al. suggest that initial brain radiotherapy, especially stereotactic radiosurgery, is critical for patients who have EGFR-mutated NSCLC with brain metastases.
However, prospective studies are needed to confirm these results, and outcomes other than survival – including quality of life and neurocognitive function – must be addressed. The authors were unable to assess these outcomes in their pooled retrospective analysis.
In addition, potentially synergetic cognitive toxicities caused by combined or sequential therapies are still unclear, and are especially important for patients who do achieve long-term survival.
Lin Zhou, MD, and associates are at West China Hospital and Sichuan University, Chengdu, China. Dr. Zhou reported having no relevant financial disclosures; one of Dr. Zhou’s associates reported having ties to AstraZeneca. Hoffman-La Roche, Eli Lilly, Pfizer, Elekta, and Varian Medical Systems. Dr. Zhou and associates made these remarks in an editorial accompanying Dr. Magnuson’s report (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.71.5706).
The findings of Magnuson et al. suggest that initial brain radiotherapy, especially stereotactic radiosurgery, is critical for patients who have EGFR-mutated NSCLC with brain metastases.
However, prospective studies are needed to confirm these results, and outcomes other than survival – including quality of life and neurocognitive function – must be addressed. The authors were unable to assess these outcomes in their pooled retrospective analysis.
In addition, potentially synergetic cognitive toxicities caused by combined or sequential therapies are still unclear, and are especially important for patients who do achieve long-term survival.
Lin Zhou, MD, and associates are at West China Hospital and Sichuan University, Chengdu, China. Dr. Zhou reported having no relevant financial disclosures; one of Dr. Zhou’s associates reported having ties to AstraZeneca. Hoffman-La Roche, Eli Lilly, Pfizer, Elekta, and Varian Medical Systems. Dr. Zhou and associates made these remarks in an editorial accompanying Dr. Magnuson’s report (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.71.5706).
Deferring radiotherapy to administer epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) first doesn’t prolong overall survival, it shortens survival in patients who have brain metastases of EGFR-mutated non–small-cell lung cancer (NSCLC), according to a report in the Journal of Clinical Oncology.
Upfront therapy using EGFR TKIs such as erlotinib has been proposed as a way to avoid radiotherapy altogether in this patient population, or to at least defer it and any related toxicities until intracranial disease progresses, said William J. Magnuson, MD, of Yale University, New Haven, Conn., and his associates.
To assess the advantages and disadvantages of upfront EGFR TKIs vs. initial radiotherapy, the researchers pooled survival data for 351 patients treated at six academic medical centers during 2008-2015. A total of 131 (37%) received upfront EGFR TKIs followed by stereotactic radiosurgery or whole-brain radiotherapy when the brain metastases progressed, 120 (34%) received whole-brain radiotherapy followed by EGFR TKIs, and 100 (29%) received stereotactic radiosurgery followed by EGFR TKIs. These patients were followed for a median of 22 months.
Median overall survival was 25 months for upfront EGFR TKIs, compared with 30 months for initial whole-brain radiotherapy and 46 months for initial stereotactic radiosurgery. At 2 years, overall survival rates for the three study groups were 51%, 62%, and 78%, respectively. Both forms of initial radiotherapy were associated with improved overall survival relative to EGFR TKIs, with a hazard ratio of 0.39 for stereotactic radiosurgery and a hazard ratio of 0.70 for whole-brain irradiation.
This survival advantage was even more pronounced in the subgroup of patients who had more favorable prognostic features at baseline. These patients had a median overall survival of 64 months if they received radiotherapy followed by EGFR TKIs, compared with only 32 months if EGFR TKIs were taken before radiotherapy, the investigators said (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.69.7144).
These findings have the potential to change clinical practice, but prospective randomized data to confirm the results are urgently needed. “Until such a study is conducted and published, the standard-of-care treatment of newly diagnosed brain metastases should remain stereotactic radiosurgery followed by systemic therapy,” Dr. Magnuson and his associates said.
No funding source was cited for this study. Dr. Magnuson reported having no relevant financial disclosures; his associates reported having ties to numerous industry sources.
Deferring radiotherapy to administer epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) first doesn’t prolong overall survival, it shortens survival in patients who have brain metastases of EGFR-mutated non–small-cell lung cancer (NSCLC), according to a report in the Journal of Clinical Oncology.
Upfront therapy using EGFR TKIs such as erlotinib has been proposed as a way to avoid radiotherapy altogether in this patient population, or to at least defer it and any related toxicities until intracranial disease progresses, said William J. Magnuson, MD, of Yale University, New Haven, Conn., and his associates.
To assess the advantages and disadvantages of upfront EGFR TKIs vs. initial radiotherapy, the researchers pooled survival data for 351 patients treated at six academic medical centers during 2008-2015. A total of 131 (37%) received upfront EGFR TKIs followed by stereotactic radiosurgery or whole-brain radiotherapy when the brain metastases progressed, 120 (34%) received whole-brain radiotherapy followed by EGFR TKIs, and 100 (29%) received stereotactic radiosurgery followed by EGFR TKIs. These patients were followed for a median of 22 months.
Median overall survival was 25 months for upfront EGFR TKIs, compared with 30 months for initial whole-brain radiotherapy and 46 months for initial stereotactic radiosurgery. At 2 years, overall survival rates for the three study groups were 51%, 62%, and 78%, respectively. Both forms of initial radiotherapy were associated with improved overall survival relative to EGFR TKIs, with a hazard ratio of 0.39 for stereotactic radiosurgery and a hazard ratio of 0.70 for whole-brain irradiation.
This survival advantage was even more pronounced in the subgroup of patients who had more favorable prognostic features at baseline. These patients had a median overall survival of 64 months if they received radiotherapy followed by EGFR TKIs, compared with only 32 months if EGFR TKIs were taken before radiotherapy, the investigators said (J Clin Oncol. 2017 Jan 23. doi: 10.1200/JCO.2016.69.7144).
These findings have the potential to change clinical practice, but prospective randomized data to confirm the results are urgently needed. “Until such a study is conducted and published, the standard-of-care treatment of newly diagnosed brain metastases should remain stereotactic radiosurgery followed by systemic therapy,” Dr. Magnuson and his associates said.
No funding source was cited for this study. Dr. Magnuson reported having no relevant financial disclosures; his associates reported having ties to numerous industry sources.
FROM THE JOURNAL OF CLINICAL ONCOLOGY
Key clinical point: Deferring radiotherapy to administer EGFR tyrosine kinase inhibitors first doesn’t prolong overall survival, it shortens survival in patients who have brain metastases of EGFR-mutated non–small-cell lung cancer.
Major finding: At 2 years, overall survival rates were 51% with upfront EGFR TKIs, 62% with initial whole-brain radiotherapy, and 78% with stereotactic radiosurgery.
Data source: A retrospective multicenter pooled analysis of survival data for 351 patients with NSCLC brain metastases followed for a median of 22 months.
Disclosures: No funding source was cited for this study. Dr. Magnuson reported having no relevant financial disclosures; his associates reported having ties to numerous industry sources.