A phase I study of the PI3K inhibitor buplarlisib (B) with concurrent chemoradiotherapy (CRT) in patients with high risk locally advanced squamous cell cancer of the head and neck (LASCCHN).

6071Background: Prognosis in smokers with LASCCHN remains poor. Activating mutations of PI3K are linked to poor outcome and PI3K activation in response to RT is implicated in resistance to CRT. Met...