STAGE 4 B CERVICAL CANCER

MY MOTHER HAS STAGE 4 CERVICAL CANCER AND THE DOCTORS WENT IN TO REMOVE THE PELVIS BONE BUT THE CANCER HAS EATEN THE BONE TO BAD AND THEY'RE SYING THE CHANCE FOR MY MOTHER SURVIVAL IS LOW / TERMINAL SHE IS ON A BREATHING MACHINE NOW BUT HER BODY IS STILL BREATHING ON HER OWN I WOULD LIKE TO KNOW IS IT ANY CLINICAL TRIALS OR ANY THING THAT CAN HELP?????