This article discusses the case of a 47-year-old woman who underwent primary therapy with curative intent for breast cancer. The case illustrates a number of failure events in transferring information and responsibility from oncology to primary care teams. The article emphasizes the importance of shared leadership, as multiple team members, dispersed in time and space, pursue their own objectives while achieving the common goal of coordinating care for survivors of cancer transitioning across settings. Shared leadership is defined as a team property comprising shared responsibility and mutual influence between the patient and the patient's family, primary care providers, and oncology teams, whereby they lead each other toward quality and safety of care. Teams, including the patient-family, should achieve leadership when their contribution is relevant in managing task interdependence during transition. Shared leadership fosters coordinated actions to enable functioning as an integrated team-of-teams. This article illustrates how shared leadership can make a difference to coordinate interfaces and pathways, from therapy with curative intent to the follow-up and management of survivors of breast cancer. The detailed case is elaborated as a clinical vignette. It can be used by care providers and researchers to consider the need for new models of care for survivors of cancer by addressing the following questions. Who accepts shared leadership, how, with whom, and under what conditions? What is the evidence that supports the answers to these questions? The detailed case is also valuable for medical and allied health professional education.