A doctor is meeting with a patient who hadn't seen a physician in 20 years. 

Doctor: "I just got your test results back, and unfortunately none of it is good news. In fact, you're suffering from two different very serious conditions."

Patient: "Well doc, tell me about the worst first, just to get it out of the way."

Doctor: "All right. You have a very advanced case of an incurable form of cancer. You have, at maximum, one month to live."

Patient: "Wow. That's pretty bad. So what's the other condition?"

Doctor: "You have a quite advanced case of Alzheimer's, with some severe neurological degeneration."

Patient: "Wow. That's pretty bad. But I guess I should be thankful; at least I don't have cancer!"