, results of the ADAURA trial showed.
Dr. Roy S. Herbst
The randomized, phase 3 trial was a comparison of osimertinib treatment with placebo following complete resection of localized or locally advanced NSCLC with negative margins. The trial was unblinded early and halted on the recommendation of the independent data-monitoring committee, due to the efficacy of osimertinib.
“If I were on the committee, I would have done the same thing. These are extraordinary results,” said study investigator Roy S. Herbst, MD, PhD, chief of medical oncology at the Yale Cancer Center and Smilow Cancer Center at Yale University in New Haven, Conn.
Dr. Herbst is scheduled to present results from ADAURA as part of the American Society of Clinical Oncology virtual scientific program.
In an online briefing prior to the meeting, Dr. Herbst said the impressive results reminded him of a lesson imparted by his mentor, the late Isaiah Fidler, DVM, PhD.
“He taught me, he taught all of us, that metastasis is a spread of tumor that kills patients,” Dr. Herbst said. “Drugs such as this, based on biology, given to patients at the earliest possible time, prevent those metastases and allow patients to live longer and with a better quality of life.”
Results from the ADAURA trial provide compelling evidence of the benefit of adjuvant osimertinib for a select group of patients, according to Tina Cascone, MD, PhD, assistant professor in the department of thoracic head and neck medical oncology at The University of Texas MD Anderson Cancer Center in Houston. She was not involved in the study.
“These are unprecedented results for a potentially curable, resected population of patients,” Dr. Cascone said in an interview. “This definitely has the potential to shift the paradigm in the treatments that we have available for patients with resected disease. It’s very important to emphasize how much we’ve learned from the metastatic setting and how we’re bringing what we’ve learned into early stage disease.”
High recurrence rates
An estimated 30% of patients with NSCLC present with resectable disease at diagnosis, but 5-year recurrence rates following surgery and cisplatin-based adjuvant chemotherapy remain high, ranging from 45% among patients with stage IB disease to 62% for patients with stage II NSCLC and 76% for patients with stage III disease, Dr. Herbst noted.
Osimertinib is a third-generation tyrosine kinase inhibitor (TKI) targeted to EGFR. It has been shown to offer improvements in both progression-free survival and overall survival compared with the EGFR-TKIs erlotinib and gefitinib for patients with advanced EGFR-mutated NSCLC, as well as in patients with central nervous system metastases.
Osimertinib’s efficacy and safety profile against advanced disease suggests it may also be effective against early stage disease, a hypothesis the ADAURA trial was designed to test.