Hi, I Am 66 Year Old But Very Strong Built,

hi, I am 66 year old but very strong built, recently had the surgery done for removal of fibromatosis tumor located above heart and trachea. recently done CT scan suggest that after 3 months again fibromatosis tumor has grown up which is compressing trachea. Doctors have refused for surgery, what is the treatment left now? please be kind in advising the same.