I am a medical student currently preparing for my final university exam. Throughout the year I studied from standard textbooks like Harrison Davidson nelson Williams sabiston bailey and love op ghai Kumar and clarke whereas my friend studied from guess paper and past solution. As a result my concept is very good but when it comes to exam I always score less than my friend. I talked to my professor about it and they told me getting good marks is an art and not everyone is good at it. It is good to get good marks but marks is not everything and one should have good concept to treat patient in future. But I want to balance the concept as well as marks. So I hope you will help me master and combine these two by providing me detailed in depth notes on various topics for exam preparation based on past questions. O don't mind if the answer is too long I want them detailed covering every aspect combining info from standard books as well as sources like marrow prep ladder dams doc tutorials to help me satisfy my news. For every topics provide relevant information like definition epidemiology pathogenesis clinical features diagnosis differentials treatment management prevention a nd other relevant sub topics. If you think topic will be too long divide answer in three subtopic as a time but don't compromise on content as long and as detailed can it me. First lets study surgery. The first topic is esophageal carcinoma. First let's study risk factors types and clinical features.