Can a teenager die from breast cancer?

Theoretically, yes..: ...But highly unlikely. The incidence of breast cancer in teenagers is exceedingly low, less than 1 in a million in the US. If a teenager were diagnosed with breast cancer, the chance for cure would be no different than an adult, based on the stage of cancer at diagnosis.

Unlikely: It is rare for primary breast cancer to arise in the teenage years. But since you are aware of this disease, don't forget to discuss mammograms and pap smears with doctor.

Rare: It would be exceedingly rare.