Diagnosed with type 2 diabetes, Aubrey Duckworth (left), 14, danced her blood sugar back to normal, doing Zumba with her mom, among other things, after WVU health screeners spotted a marker on her neck that signals diabetes risk. "We're grateful," said Gwen Duckworth (right).

The AN marker shows up as a dark linear patch on the neck. Nationwide, black children develop the AN marker more often.

"There is a huge amount of diabetes in West Virginia," says Dr. Pamela Murray. "[AN marker screening] is one way to catch many children early."

Rebecca King, director of the state's school nurse program, says screenings for the AN marker should be performed by a child's regular doctor, not by a school nurse.