The McDonald's Corporation will have to answer a lawsuit filed by four New York teenagers who allege the company hid the health risks of hamburgers and Chicken McNuggets.

The suit blames McDonald's for the teenagers' obesity and health problems, and it asks billions of dollars in damages. McDonald's is the world's largest fast-food chain, and company officials have called the lawsuit "frivolous."

A district judge originally dismissed the suit, but an appeals court late Tuesday allowed the case to move forward and cleared the way for the teens to demand that McDonald's turn over documents.

The case was originally filed in 2002, and is the first obesity-related lawsuit against a food company to reach a judge.

Some information for this report provided by Bloomberg, AP, AFP and Reuters.