Delirium in patients with head and neck cancer in the outpatient treatment setting

Purpose Delirium is a common neurocognitive disorder among patients with cancer. In patients with head and neck cancer, delirium has been examined in the postoperative setting. Because no studies have reported on delirium during outpatient cancer treatment, we conducted a prospective study in 69 patients with head and neck cancer to examine neurocognitive function before, during, and after outpatient treatment. We also conducted a retrospective study in a subset of caregivers. In this paper, we report the prevalence and incidence of delirium and subsyndromal delirium (SSD) during outpatient treatment.