There are several sites on the internet to help you. One is www.talkingmedicine.com which also gives links to other sites.

I certainly disagree that business English is sufficient to teach medical English. It is not just a question of specific vocabulary but usage of certain words and expressions in a medical context. Listen to the free material in Talking Medicine

by using the contact form on the site. Good luck Ricardos

Dorlands online at http://www.dorlands.com/ Hope this helps Ricardos

The secret is regular exposure/listening/practice. If you can spend 6 months in the UK or USA that's best. If you cannot, the next best thing for medical English is http://www.talkingmedicine.com

Anybody needs regular practise with medical English, vocabulary, pronunciation and testing your understanding try http://www.talkingmedicine.com