"A recent CT scan made me realize that the clinical trial extending my life effectively excludes all but the most privileged cancer patients.
"I used to weasel out of scans. Chalk it up to trepidation about radiation and possible kidney damage, along with paranoid suspicions that such scans don’t yield definitive pictures. My oncologist and I had agreed to fudge on frequent testing. But the clinical trial did not."
Editor's Note: Learn more about clinical trials here.