Detailed Results from Phase 3 CABINET Pivotal Trial Evaluating Cabozantinib in Advanced Neuroendocrine Tumors Presented at ESMO 2023

– Cabozantinib compared with placebo reduced the risk of disease progression or death in patients with pancreatic NET and in patients with extra-pancreatic NET –

– Exelixis will discuss the results with the U.S. Food and Drug Administration –

ALAMEDA, Calif.--(BUSINESS WIRE)-- Exelixis, Inc. (Nasdaq: EXEL) today announced detailed results from CABINET, a phase 3 pivotal trial evaluating cabozantinib (CABOMETYX®) compared with placebo in two cohorts of patients with previously treated neuroendocrine tumors: one cohort of patients with advanced pancreatic neuroendocrine tumors (pNET) and a second cohort of patients with advanced extra-pancreatic NET (epNET). The study met the primary objective for each cohort, demonstrating that cabozantinib provided dramatic improvements in median progression-free survival (PFS) for the patients in the pNET and epNET cohorts. The data are being presented today at 8:40 a.m. CET during the Proffered Paper Session – NETs and Endocrine Tumours at the 2023 European Society of Medical Oncology (ESMO) Congress (LBA53) by the Alliance for Clinical Trials in Oncology. CABINET is sponsored by the National Cancer Institute (NCI), part of National Institutes of Health, and is led by the NCI-funded Alliance for Clinical Trials in Oncology and conducted by the NCI-funded National Clinical Trials Network Group.

“Although progress has been made in recent years, there remains a critical need for new and effective therapies for patients with advanced neuroendocrine tumors. Given that there is no standard treatment for patients with progressive disease, these results showing notable improvements in progression-free survival are highly encouraging for patients and their physicians,” said Jennifer Chan, M.D., M.P.H., study chair for the CABINET trial and Clinical Director of the Gastrointestinal Cancer Center and Director of the Program in Carcinoid and Neuroendocrine Tumors at Dana-Farber Cancer Institute. “I am pleased to present these important findings at ESMO today, as they underscore the potential of cabozantinib as a much-needed new treatment option for this disease, which is rising in incidence.”

As announced in August, CABINET was stopped and unblinded early due to the dramatic improvement in efficacy observed at an interim analysis, per a unanimous recommendation of the Alliance for Clinical Trials in Oncology independent Data and Safety Monitoring Board (DSMB). The DSMB based their vote on data from interim analyses of PFS using local radiology assessments. Ancillary analyses were conducted using local and central assessments of patients enrolled through June 2023.

Results from the CABINET study presented today at ESMO demonstrate that treatment with cabozantinib resulted in compelling improvements in PFS based both on local review and on independent blinded central radiology review. In the pNET cohort, at a median follow-up of 16.7 months, median PFS based on local radiology review was 11.4 months for patients receiving cabozantinib compared with 3.0 months for patients receiving placebo (stratified hazard ratio [HR]: 0.27; 95% confidence interval [CI]: 0.14-0.49; p