The KFG system looks nice, with PM support and all.
Regarding the treatment options; I guess it depends on what or how much your main concept can carry, it does seems an awful lot to bite down on (an anatomy browser+health wiki+treatment options). But as you say it's a proof of concept and maybe you just want to think big in this part of the process. I think it's a good idea to sketch out and consider beforehand just who is going to use it and how, ala case scenarios, so your time developing is used effectively. Your app aims to explain both medical vernacular, diseases and treatments, that's a lot of different possibilities of users that may not want to use it for the same purpose and overreaching could spoil the end product. But I can totally follow you in trying to dream up this kind of panacea app, though have found that most of my ideas that try to fathom too much into a single format needed a reality check for them to be manageable.
Another issue with the treatment option would be who with what qualifications will offer the advice, as this is an area of great responsibility. In France for example it's illegal to offer medical advice unless you are authorized, online as well. I think many people self diagnose with google, doing their own research for alternative treatments, because people have lost faith in the mainstream doctors who rather mindless dispense pharmaceutical symptom fixes, but probably also to save some bucks, all this does open up for such online advice enterprises, but legal and ethical considerations are a must.
The ethical/ responsibility concerns regarding offering hopefully well researched advice can't be stressed enough IMO, in these times of medical myths and bogus treatments such as Statins, HPV and other vaccines, etc. So that one doesn't unwittingly propagate industry controlled conclusions which many times actually are the opposite of healthy.
Btw, I study multimedia design.
