from USMLE Wiki, the free USMLE resource
From USMLE Wiki
What is USMLE Wiki
The purpose of the USMLE Wiki is to be a central repository or Knowledge Base of all important concepts tested in the United States Medical Licensing Examination. It is written at the level of the USMLE and therefore will not be as comprehensive as Medical Textbooks. However, it aims to contain enough details that it is possible to ace the USMLE with the contents contained in the Wiki and therefore will be more comprehensive and detailed than the average review books like First Aid for the USMLE and the Board Review Series reviewers to name a few. The USMLE Wiki will also strive to contain as many commonly tested medical images available under GNU, Creative Commons Licenses, Public Domain and the kindness of contributors.
However, best of all, it is free to view online.
Please read the Current Events section to get the latest news about the progress of the USMLE Wiki Project.
The USMLE Wiki is a work in progress. Come back from time to time to see the changes.
If you want to know what to study for the USMLE, then USMLE Wiki is the place to find it.
If you want to know how to study for the USMLE, then go to Askdoc's USMLE Blog
To view the table of contents: Table of Contents
To search the USMLE Wiki: The USMLE Wiki Search defaults to the Main Namespace. In order to search the USMLE Wiki and Help Namespace, you need to select them. If you are logged in, go to preference and select to search both USMLE Wiki and Help. It will then search both namespace everytime you are logged in. If you are not logged in, then press search first. It will return a page with no item found. Check both USMLE Wiki and Help checkbox, then search again.
Also search whole words instead of acronym. For example, IL-6 will result in not found while Interleukin-6 will get you what you want.
If you would like to participate in editing and finishing the USMLE Wiki, please register and learn Wiki syntax. You can register starting May 26, 2008. Consult the Editorial Guidelines before starting.
Consult the User's Guide for information on using the wiki software.