a limb and would normally strike someone several times her age. >> i've lost over 100 pounds. i've changed my diet completely. i'm more focused on my health now. >> myself as her primary caretaker, i had to change my lifestyle in terms of the way i eat, what i shop for. >> reporter: doctors meeting in san diego tell us it's frightening what they're seeing. in areas where childhood obesity is at its worst, they say as much as 40% of all new patients diagnosed with type 2 diabetes are teenagers between 10 and 17 >> with one out of three children being either overweight or obese, we are seeing an increased occurrence of type 2 diabetes in the second decade of life. >> reporter: for some teens with type 2 doctors are suggesting gastric bypass surgery. it worked for amanda munson. she lost 100 pounds. >> i no longer have to take medicine for my diabetes. i don't have to worry about my heart rate or heart pressure problems. >> reporter: janelle jolley told

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