Very useful pdf document from HTH Worldwide of common medical terms sorted by English.
http://www.hthworldwide.com/GHA/tools/translations/17_25_terms.pdf
Their mPassport Tokyo app for the iPhone, iPad and iPod touch is also useful for anyone based in Tokyo (the app is currently free to download).
http://itunes.apple.com/us/app/mpassport-tokyo/id385113776?mt=8
Filed under: Current Information, Medical Terms in Japanese, Survival Information, 2011, Communication, Crisis Information, English Sources, Interpreting, Japan, Japanese, Language Support, Medical, Medical Care, Terminology, Translation