I heard from Sue today. Walt has just been diagnosed with Mesothelioma, cancer of the pleura (lining of the chest cavity), which is asbestos related, fast growing and incureable.
Per Sue: "The tumor is too large to operate on or to radiate so his only options are chemotherapy or no treatment. He has opted to at least try chemotherapy which he will begin this week. They will give him 2 rounds of treatment and then take a ct scan to see if the tumor has stopped growing, and hopefully, shrunk. If the chemotherapy works to shrink the tumor his prognosis is maybe 18 months, maybe more or maybe less. If the chemotherapy doesn't work or if Walt decides the chemo isn't worth it than the prognosis is 12 months if we're lucky."