Extraskeletal myxiod chondrosarcoma

My mother is 67 and she went to the doctor for a lump in the back of her knee. Just recently they have determined it as extraskeleta myxiod chondrosarcoma. Because the doctors took so long to determine it, it has now metastise to her lungs. They don't give her more than a year, but they are going to attempt chemotherapy anyways. Is there anything we can do??? Maybe diet to help cure the cancer naturally? Please help! my mom means the world to me. Tweet