You know Jess, when I read this chapter suddenly I remembered about my pathophysiology class and this week I'll have presentation about cancer too
Okay, that's was an intermezzo
as usual, your story is good, though sometimes I got confused with the words
maybe because I read it when it was blackout and It's already 1.30 am here? 
BUT I like this chapter because you didn't put any uncommon medical term that might be confusing to the readers. Good job!
and Don't say that Ron will be a donor for Bone Marrow transplant!
~Raven chan