A majority of patients with advanced
EGFR/HER2-mutant non-small cell lung cancer (NSCLC) benefited from treatment with the tyrosine kinase inhibitor (TKI) poziotinib, according to a preliminary clinical trial.
An efficacy cohort of 79 patients who received investigational poziotinib 16 mg as initial therapy had an objective response rate (ORR) of 28% and disease control rate (DCR) of 86%. Overall, 72 of 79 (91%) patients had tumor reduction averaging 25.5%. Initial data from an ongoing dosing evaluation involving previously treated and untreated patients showed objective responses in seven of 30 patients and stable disease in 11 treated with 16 mg, resulting in a DCR of 60%.
Tolerability remains a challenge, as a majority of patients in the dosing study required treatment interruptions and dose reductions, and about a third of patients treated with 16 mg had grade ≥3 adverse events, reported Adrian Sacher, MD, of Princess Margaret Cancer Center in Toronto, during the European S