Abstract
Symptomatic individuals presenting to their primary care providers may need further evaluation and/or testing to determine whether a cancer is present. A number of issues arise in determining who needs further testing, what tests are needed, which specialists need to be involved, and how the testing can be organized and supported within a specific health-care system within a timely, coordinated, and cost-efficient manner. This article explores the challenges in the interface of primary care providers and specialists, includes evidence from prior research, and proposes research opportunities to understand and improve this phase of care.