Jazlyn Bradley loved her McDonald's Super Sized. A McMuffin in the morning and the Big Mac meal with an apple pie in the evening was standard operating procedure.

Ashley Pelman was more of a Happy Meal girl. She liked the prizes.

Ms. Bradley is 19 years old, 5-foot-6 and 270 pounds. Ms. Pelman, 14, is 4-foot-10 and weighs 170.

Now, the two teenagers are suing the McDonald's Corporation and the two Bronx franchises they frequented for damages related to their obesity. Yesterday, a judge in United States District Court in Manhattan heard a motion to dismiss the case presented by lawyers for McDonald's.

The judge, Robert W. Sweet, has not ruled on the motion, and the case has yet to reach trial. But the idea of suing McDonald's, and fast food companies in general, for health problems like obesity and diabetes that may stem from the consumption of their products has been an issue of great concern for the industry for months now. McDonald's and restaurant industry officials say the teenagers' lawsuit is the first to find its way into a courtroom.