Later that night, House limps into the lab to find the Cottages, who have run a battery of tests on 77 and come up with no cancer, not even in the breast! And yet, 77's kidneys are starting to fail, which Hadley says means he must have cancer somewhere. So why don't they just give him chemo like they do to all the other patients who they think have cancer but have no idea where? "Why can't we find it? We've looked everywhere inside this guy," Foreman complains. House says the cancer might not be inside and takes off.