Introduction/aims: The impact of loneliness is increasingly recognised. It is associated with low quality of life, poor physical and mental health and negative prognosis for a variety of medical conditions. It is challenging to identify and assess.Materials/methods: Patients treated for primary squamous cell head and neck cancer (HNC) in 2016/2017 were surveyed in early 2019 using the University of Washington Quality of Life questionnaire v4, the Cancer-Related Loneliness Assessment Tool (C-LAT) and four nationally recommended indicator questions. The C-LAT assesses (1) patients perceived relationship deficiencies since being diagnosed and (2) levels of distress caused by these deficiencies.Results/statistics: The responses suggest about on...