examination of english for medical textbooks through the lenses of corpus linguistics

In recent years, english for specific purposes (esp) has become more important. in the meantime, english for medical purposes, which is one of the sub-branches of english for special purposes, is vital for medical students. this study will be conducted to evaluate textbooks taught in english classes in various medical programs. this study will focus on six textbooks widely used in medical colleges. the framework of the study is corpus linguistics. the authors aim to compile a corpus of english for medical programs (emp) and a youtube video corpus containing medical content. they will focus on the textbook corpus and compare it with the youtube corpus and the already available corpus calling the medical web corpus. the highlighted questions in this study are: 1. what are the most common words in the youtube corpus? 2. what are the most common words in the emp corpus? 3. how consistent is the youtube corpus with the medical web corpus? 4. which words of youtube corpus do not exist in emp? and how important is it to get them involved? the findings of this study will provide useful insights to the community of instructors and even decision makers who are connected with teaching esm in medical universities of iran.