Ack, why doesn't Izzie, I don't know, ask her friends, the residents, or perhaps the oncologist (or dermatologist?) she met with to figure out what's going on with her? Why would she trust the interns? She's wasting valuable time! Not that I like her very much, and I know what happens, but this just seems so stupid to me...I know she might not want to accept that something's wrong, but she's a doctor! In a (supposedly) well-renowned hospital. She has access to all kinds of experts. OK, rant over.
Also, that PP crossover was so sad and also confirmed that I have no desire to rewatch Private Practice, because those characters are really annoying together!