The Cottages test the final piece in a procedure that I've been informed via an email from a pathologist was ridiculously inaccurate and lacking in proper histology procedures. This was no surprise to me, since I assume that any and all medical things I see on this show are totally inaccurate and suggest that everyone else do the same. But anyway, the slide is positive for CD68, and therefore, Erdheim-Chester. House is so happy that he punches a wall, startling the Cottages. Hey, he's got twelve years of relief to get out, there, guys; let him vent. Plus, he loves being right. "Start the treatment," he orders. The Cottages go off to do that, although I'm not sure exactly what they're going to be doing, since there doesn't seem to be any standard treatment for Erdheim-Chester at all and everything I saw said that the disease was fatal in just a few years. Of course, they also said that Erdheim-Chester was an adult-onset disease, so whatever.
So the Cottages treat Ian with some magic drugs as House plays the piano left in the Clinic from the benefit. Ian is cured and is not even brain-damaged. Everyone is happy, especially Cuddy, who would have had her ass handed to her if he had died from what she thought was gastroenteritis and dehydration. Wilson finds House at the piano and they share a look of longing. I am so pissed off that the scene of House and Cuddy sharing a piano bench got cut out of this montage.
As workers clear the benefit stuff away to prepare the Clinic for another day of patients with strange penis issues and goldenrod snot, Wilson and House take advantage of the free poker table and play a game. Wilson tells House that the Erdheim-Chester was just a good guess and that House got "lucky." Actually," House says, "the barnacle is the lucky one, because its penis is proportionally larger than any other animal's." It seems that House writers are more steadfast in their quest for accuracy when it comes to animal wangs than medical stuff, because this is correct: the barnacle can't move, and has to rely on a penis up to twenty times its own length to travel around and find something to mate with. Good times. The guys crack up and discuss more animal kingdom factoids, like how white whales have six-foot long penises, as we fade out.