ARLINGTON, Texas (CNN) - To begin with, Gregory Rose didn't have health insurance. Plus, it was finals week. So his first instinct was to ignore the pain.
A walk across his apartment convinced him otherwise.
"My hip was like on fire, grinding" is how he recalled the morning seven months ago that changed everything. "I know pain, and I've never felt that kind of pain before," Rose said.
At the hospital, a blood test with startling results: a dramatically elevated white blood cell count. He had leukemia, at 23.
Rose had no health insurance because he was too old to be covered on his parents' policy and too young and seemingly healthy to think he needed it.
So count Rose among the estimated 47 million Americans who lack health insurance, and as a resident of a state with the highest percentage of uninsured: Nearly one in four Texans do not have health coverage.