My mother-in-law has undifferentiated polimorphic scaroma in her throat spine and abdomin area. It

My mother-in-law is currently undergoing chemo and radiation. She is having trouble swallowing. Is this causing permanant damage to her esophagus? They are telling us that it has spead through out her body. Primarily, the chemo and radiation is for pain management. She was just diagnosed 5 weeks ago. She has 4 tumors on her sping and 6 in her abdomin area. Any help would be aprreciated for what to expect.