In a move that threatens to further inflame concerns about the rationing of medical care, the nation's leading association of cancer physicians issued a list on Wednesday of five common tests and treatments that doctors should stop offering to cancer patients.

The list emerged from a two-year effort, similar to a project other medical specialties are undertaking, to identify procedures that do not help patients live longer or better or that may even be harmful, yet are routinely prescribed.

As much as 30 percent of health-care spending goes to procedures, tests, and hospital stays that do not improve a patient's health, according to a 2008 analysis by the nonpartisan Congressional Budget office.

Read more: Fox News