Abstract
BACKGROUND: Regular surveillance imaging is commonly used after curative-intent resection of most solid-organ cancers to enable prompt diagnosis and management of recurrent disease. Given the fear of cancer recurrence, surveillance may lead to distress and anxiety ("scanxiety") but its frequency, severity, and management among cancer survivors are poorly understood. METHODS: A systematic review of the PubMed, Embase, CINAHL, and PsycINFO databases was conducted to evaluate existing literature on anxiety and emotional experiences associated with surveillance after curative-intent cancer surgery as well as interventions aimed at reducing scanxiety. RESULTS: Across the 22 included studies encompassing 8693 patients, reported rates of scanxiety varied significantly, but tended to decrease as time elapsed after surgery. Qualitative studies showed that scanxiety arises from various factors innate to the surveillance experience and is most prevalent in the scan-to-results waiting period. Common risk factors for scanxiety included sociodemographic and cancer-related characteristics, low coping self-efficacy, pre-existing anxiety, and low patient well-being. Conversely, reassurance was a positive aspect of surveillance reported in several studies. Trials evaluating the impact of interventions all focused on modifying the surveillance regimen compared with usual care, but none led to reduced rates of scanxiety. CONCLUSIONS: Although scanxiety is nearly universal across multiple cancer types and patient populations, it is transient and generally limited in severity. Because existing trials evaluating interventions to reduce scanxiety have not identified effective strategies to date, future research is needed to identify interventions aimed at reducing their impact on high-risk individuals.