Approximately 70% of women experience moderate to high levels of fear of cancer recurrence (FCR) and up to 15% experience severe, disabling FCR characterised by constant, intrusive thoughts about cancer; interpretation of mild, unrelated symptoms as a sign of recurrence; a belief that cancer will return regardless of actual prognosis; and an inability to plan for the future due to cancer worry. FCR is a routine reason for seeking professional clinical support and is associated with psychological distress, poorer social and occupational functioning, and increased health care costs.

This study will provide useful exploratory data from the PROSPECT clinical trial, about the association between therapy de-escalation by omitting radiation therapy and FCR. It will also examine FCR and quality of life in women with DCIS.