1 Normal Anatomic Relationships and Variants -- 2 Intraperitoneal Spread of Infections -- 3 Intraperitoneal Spread of Malignancies -- 4 The Extraperitoneal Spaces: Normal and Pathologic Anatomy -- 5 The Renointestinal Relationships: Normal and Pathologic Anatomy -- 6 The Duodenocolic Relationships: Normal and Pathologic Anatomy -- 7 Intestinal Effects of Pancreatitis: Spread along Mesenteric Planes -- 8 The Small Bowel: Normal and Pathologic Anatomy -- 9 The Colon: Normal and Pathologic Anatomy -- 10 Internal Abdominal Hernias -- 11 Pathways of Extrapelvic Spread of Disease -- 12 Dynamics of Plain-Film Analysis of the Abdomen