Did cancer kill this little girl ?

She died from complications due to cancer . . she developed an infection that ordinarily a healthy body would be able to fend off with treatment. Almost any type of infection . . bacterial or virus or fungal can be life threatening for cancer patients because of lowered immune system. An example would be a common bacteria found on everyones skin can become harmful to anyone with a lowered immune system . . the body is unable to fight off simple infections. It happens. Not sure what difference this makes to you as this little girl still lost her life because of complications due to cancer. With cancer there is no cure for cancer, only treatment that may lead to an individual 'cure' or remission. There are no guarantees.