One of the challenges in treating cancer is the disease's complexity and variation among patients. Cancer manifests differently in each patient, so treatments that are effective in one patient may not be effective in another. As cancer care becomes more personalized, subpopulations of individuals will be given preventive or therapeutic interventions based on their susceptibility to a particular disease or their predicted response to a specific treatment. However, before the use of personalized cancer care can reach its full potential, the health care system must resolve a number of technological, regulatory, and reimbursement issues. .
