The Self-Perpetuating Cycle of Psychological Distress and Clinical Outcomes in Head and Neck Oncology

Background: Head and neck cancer (HNC) presents unique challenges due to impairments in vital functions and appearance. This narrative synthesis of systematic review synthesizes evidence on the prevalence and predictors of distress in HNC and proposes a Multifactorial Cycle of Distress to explain how psychological burdens compromise clinical outcomes. Methods: A systematic search of PubMed and Scopus was conducted (up to June 2025). From 342 articles, 32 were included, covering HNC patients with quantitative or qualitative distress assessments related to quality of life (QoL) and survival. Results: Distress prevalence ranged from 23–47%, with 30% of survivors experiencing persistent symptoms long-term. Key predictors included advanced tumor stage, radiotherapy-induced side effects, and pre-treatment depression, which increased distress risk 2- to 3-fold. Notably, distress was associated with a 25% reduction in radiotherapy completion and a 55% increased risk of mortality. Additionally, 71% of patients experienced decision regret, further impacting outcomes. Psychosocial interventions, including cognitive-behavioral therapy and mindfulness, showed potential in reducing anxiety by 15–20%. Conclusions: Distress in HNC functions as a self-perpetuating cycle where physical morbidity triggers psychological barriers that directly impair treatment adherence and survival. Routine screening using tools like the Distress Thermometer or DIC-2 and integrated multidisciplinary care are essential to break this cycle and improve patient and caregiver well-being.