Bone tumors may be of many types. As per your information she seems to be suffering from malignant bone tumors. Without proper diagnosis and staging it is difficult to comment on prognosis. Malignant bone tumors may be osteosarcoma
, ewing's sarcoma, chondrosarcoma, lymphoma , chordoma. Prognosis and treatment is different in each cases. Anyway, bone tumors can itself cause severe pain
due to nearby nerve involvement and bone destruction. there are high chance of response after treatment. At present proper diagnosis of pain to be made. Titration of analgesic
medications to be done and if needed local radiation
therapy may be considered. please consult your oncologist
. Take care of your friend.