Abdominal Key

Inflammatory Bowel Diseases Diarrhea is common, and it has been estimated that even in Western countries most experience at least two episodes of infectious diarrhea annually (see chapter on infections)….

Small and Large Bowel Polyps and Tumors INTRODUCTION This chapter discusses polyps and tumors of the small and large bowel, which are primarily mucosal or epithelial. Lymphoproliferative disorders (see Chapter…

Stomach and Proximal Duodenum: Inflammatory and Miscellaneous Disorders CLASSIFICATION OF GASTRITIS AND GASTROPATHY Though no classification of gastritis satisfies everyone, the overall goal of any classification is to help clear…

Enteric Infections and Associated Diseases INRODUCTION Gastrointestinal (GI) infections are a major cause of morbidity and mortality on a global scale, second only to upper respiratory tract infections. The global…

Gastric Epithelial Polyps and Tumors ADENOMA/DYSPLASIA/INTRAEPITHELIAL NEOPLASIA Definitions and Terminology Gastric epithelial neoplastic lesions, which do not fit the criteria for an adenocarcinoma, have traditionally been referred to as adenomas…

The Anal Canal ANATOMIC AND HISTOLOGIC CHARACTERISTICS Terminology Used for the Anus, Distal Rectum, and Perianal Skin and Problems with These Terms There are numerous terms applied to the anal…

Appendix INTRODUCTION Over a century ago, two major things put the appendix in the public eye. The first was on the medical front where the appendix was firmly on the…

Small and Large Bowel Structure: Developmental and Mechanical Disorders STRUCTURE OF THE SMALL AND LARGE INTESTINES External Appearance Small intestine. The adult small intestine ranges from 300 to 900 cm…

Small Bowel Mucosal Disease SMALL BOWEL MUCOSAL DISEASE A diverse array of disorders can be diagnosed with small bowel biopsy. However, in our experience, the evaluation of nonneoplastic small bowel…

Inflammatory Disorders of the Esophagus: Reflux and Nonreflux Types GASTROESOPHAGEAL REFLUX DISEASE (REFLUX ESOPHAGITIS-GERD/GORD) Definition of GERD Gastroesophageal reflux disease (GERD) is defined as at least weekly heartburn, acid regurgitation,…