Comment by BrokenCogs

That's because the baseline response doctors are used to goes something like this:

Doc: "Do you have any other medical conditions besides your {red eye,stomach ache,itchy foot}?"

Patient: "No."

Doc: "Are you taking any meds?"

Patient: "Yes I am currently on chemotherapy for my cancer."

Doc: "Okay... so you have cancer?"

Patient: "Yes I have lung cancer."