Endoscopic Submucosal Dissection (ESD) is a minimally invasive treatment for early- stage gastric, esophageal, stomach, and colorectal cancer, pioneered in Japan as an approach intended to improve malignant post-surgical health conditions, including loss of appetite, fever, and pain. For ESD to become recognized as standard treatment, it is essential to understand pre-operative diagnosis. This book reviews the diagnostic process, by discussing various cases with precise explanations and observation and basic understanding of invasion depth diagnosis, diagnostic coverage, and qualitative...