Hi and welcome to HCM. It would be better if you posted PET CT images. First, this should have been prevented and discovered at the time tumour was operabile. She should have had more frequent CT checks up. Secondly, neuroendocrine liver metastasis have more favorable prognosis then colorectal and lung metastasis and surgeon should always try to operate it except when there is major vessels infiltration. It is impossible to predict survival. It depends how will she react on chemo and how fast would tumour grow but I consider that it should be several years.YOu should show PET CT to expert surgeons and see is there possibility of surgical procedure. Wish you good luck.