Hi, Alina.
I am very sad to learn about your elder sister. Well, can you write me how long it's been that your elder sister have been diagnosed of cancer, because they can be treated if it's not been long I mean if it's at its early stage. Also, breast specialist like as
Dr. Robert Goulet could give possible solution for your sister. Along with this, try to surf other cancer related sites for the solution as well.
Thanks.
"Have faith in yourself and the world will be at your feet."