Kalvin is having problems. Foreman and Cameron tend to him, thinking that his blood vessel rupture has re-opened and is filling the area around Kalvin's heart with blood. Despite the possibility of having more blood coughed in their faces, Cameron and Foreman still refuse to wear face shields. Cameron's even wearing some rather tiny glasses in lieu of safety goggles. Whatever. Foreman gets ready to jab Kalvin with something that will drain the blood around his heart as Cameron reassures the panicking Kalvin that he's not dying. Kalvin's smart enough to know that a doctor who isn't capable enough to not get AIDS blood coughed all over her face probably isn't capable enough to keep her patients alive, and gives Cameron a final message for his father: he's sorry. Foreman goes to drain Kalvin's heart, only to find that there isn't any blood there. The only thing Foreman can think of that would do this is a tumor. A cancer tumor.
Back in the meeting room, Wilson gets to do his job, and reports that they have found several masses in and around Kalvin's heart. How did it take them this long to find them? Are you telling me that Chase didn't see anything when he went in there to repair that tear in Kalvin's lungs and that none of those masses showed up in that original chest x-ray, despite the scarring? Come on. Wilson asks Cameron how she's doing, but House tells him to stop asking Cameron about her health when they have a real patient to deal with. And so it was. Wilson assumes that Kalvin has Non-Hodgkin's lymphoma, but Cameron hates it when people are diagnosed with terminal cancer and suggests that Kalvin might just have sarcoidosis, even though the lung tissue test was negative for it. Sigh. Cameron demands to do some kind of cell spot test for sarcoidosis. House says that will require a ton of signed paperwork. Cameron doesn't seem to care. We don't see Wilson or the rest of the Cottages during this argument, but I think we can assume they're all making a series of unattractive disgusted faces as they remember what happened the last time Cameron refused to believe that someone had terminal cancer. House sends everyone off to do the cell spot paperwork, and asks Cameron whether she managed to get hold of Kalvin's dad yet, since House knows Cameron well enough to know that Kalvin's last request sent Cameron straight to the phone, probably when she was supposed to be treating Kalvin. Even Steve McQueen knows Cameron well enough to know that by now. We don't know Foreman or Chase that well, though. How strange. Cameron admits that she totally did call Kalvin's dad, who said he doesn't want to see his dying son. House tells her to leave the family stuff alone, since it has nothing to do with Kalvin's medical problems and Kalvin didn't mean what he said on his deathbed anyway. If he really wanted his dad to know he was sorry, he wouldn't have to be at death's door to tell him so. Cameron asks House what he said when he thought he was dying, and House changes the subject right back to Kalvin. He wonders what Kalvin has to apologize to his dad for, if his dad was the one who threw Kalvin out. "Everybody has regrets," Cameron says meaningfully, if not answering-the-questioningly.