Insomnia in adult patients with cancer: ESMO Clinical Practice Guideline.

• Insomnia is common in patients with cancer, with a higher prevalence than observed in the general population. • Insomnia is often under-recognised and inadequately treated in patients with cancer. • Brief validated screening tools are available for the evaluation of insomnia in clinical practice. • First-line therapy should be based on international guidelines recommending cognitive behavioural therapy for insomnia.