Una mano para Mariangel. Mariangel needs you

Hi, my name is Mariangel Centeno. I am15 years old. I’ve been living a calm and happy life like any other girl my age, going to school which I enjoy, I have lots of friends and I’m in high school.

Everything has been good up until July of 2019. I began having pain in my left knee for no reason. I thought maybe I twisted it or something but wasn’t sure. I didn’t pay much attention to it and it was gone after 3 or 4 days.
But then a month later it came back and lasted longer than before. I went to the doctors to check it and he sent me to get an MRI.
The results showed that there  was a suspicion of Osteosarcoma, and after having a biopsy it was confirmed Osteosarcoma distal 1/3 on my left femur. 

Now I need to go through chemotherapy and after I will need an operation to replace my left femur. The treatment and surgery is very expensive as well as the price of the prosthesis I will require.

Me and my family lived in Venezuela, which makes the situation harder because all the problems in here.

Please, anything helps. As soon as I finish Chemotherapy I will need to replace my femur.

I need you help, please!