CLL need not be terminal. Many people die from other causes. How bad it is depends on which genes are deleted, your symptoms, your general state of health, etc. Ask the oncologist to run a FISH (flourescence in situ hybridization) test. This is a genetic test that will determine prognosis. If your father only has a 13q deletion, he will never die from CLL. Also, there are other markers that will tell more about prognosis. In the flow cytometry test, there is a marker called CD38. If it is negative, that also bodes well for your father's prognosis. CLL is NOT one disease for everyone. It is not "one size fits all." I personally know of several people, myself included, who have had CLL for years, and are still healthy. Mine is "stable" according to Johns Hopkins. I've never had, nor hope to ever have, any "treatment." Chemo kills good cells as well as bad. If your Dad is as bad off as you say, insist he be treated with immunotherapy instead, which targets only the bad cells. This treatment uses monoclonal antibodies, Rituximab is one such drug, to knock out only the CLL cells. CLL is considered to be the "good" leukemia, if there is such a thing, because many people die with it, not of it. Do more research on the internet, plug in chronic lymphocytic leukemia and prognosis, or other choice words, and see the wealth of info that pops up.