lung cancer diagnosis
Cancer Center
Lung cancer

Are Lung Cancer Survivors Getting Too Many Costly Scans for No Reason?

Once you’ve made it through lung cancer treatment, you want to make sure you catch it early if it comes back again. However, a University of Michigan study published in February 2016 in the Journal of the National Cancer Institute suggests that one approach to watching for a cancer’s return is being inappropriately used at many hospitals. And it isn’t helping patients survive longer, the research shows.

A release from the university explains that the study looked at how often survivors of lung and esophageal cancer went through a kind of imaging called positron emission tomography (PET) scanning as the primary way of monitoring their condition instead of as a backstop to other kinds of scans.

PET scans are expensive but potentially powerful. They let doctors see increased activity by cells inside the body – including fast-growing cancer cells – and can do so early. Many cancer patients receive PET scans as part of diagnosis, to see how advanced their cancer is, and to see how it’s responding to treatment.

But the scans aren’t recommended as the first option for long-term monitoring to watch for recurrence.

In fact, it’s one of the few imaging tools for which the Medicare system imposes limits – currently, three follow-up PET scans per person, even when doctors only order them after spotting something on a CT scan or other medical image.

Too much, too varied?

Despite this, the researchers from the University of Michigan Medical School and Dartmouth-Hitchcock found widespread use when they looked at Medicare data for more than 100,000 lung and esophageal cancer patients who had cancer in the mid-2000s and follow-up care through 2011.

More than 22 percent of the lung cancer patients, and 31 percent of the esophageal cancer patients, had at least one PET scan to look for a cancer recurrence during their follow-up period, without first having a CT scan or other imaging.

Hospitals varied widely in how often they used this approach, from nearly never at some to a majority of the time in others. Some hospitals used it eight times more often than others.

And no matter how often they used it, the result was the same: patients who went to a high PET-use hospital for their lung cancer follow-up were just as likely to survive two years as those who went to a low PET-use hospital.

The release quotes Mark Healy, M.D., a surgical resident and research fellow at the U-M Department of Surgery and member of the Center for Health Outcomes & Policy, as saying, “PET scanning is a great technology and very effective, but using it in this way doesn’t seem to make any difference for these cancers that have a relatively poor prognosis. The appropriate use of PET scanning in follow-up care for lung and esophageal cancer is after findings on lower-cost imaging options.”

National guidelines call for this type of use, but the new findings suggest they are not being followed.