Textbook of Gastrointestinal Radiology

Barium Studies of the Colon

Barium enemas are not commonly performed in modern radiology practice because of greater use of other diagnostic tests such as colonoscopy, computed tomography (CT), and, most recently, CT colonography. As senior radiologists retire, it has become increasingly difficult for young…

Miscellaneous Abnormalitiesof the Small Bowel

Abnormalities of Small Bowel Development in Adults MECKEL’S DIVERTICULUM During embryologic development, the yolk sac is connected to the midgut by the omphalomesenteric duct, which is later obliterated during the seventh to eighth weeks of embryogenesis. Persistence of the entire…

Postoperative Small Bowel

Surgical treatment of small bowel disease requires the use of relatively few surgical techniques, and most are applicable to any segment of the jejunum and ileum. These techniques include enterotomy for removal of polyps or foreign bodies; enteroplasty for treatment…

Vascular Disorders of the Small Intestine

Small bowel abnormalities continue to be a significant diagnostic challenge for clinicians and radiologists. Clinicians have historically struggled to diagnose many small bowel diseases because patients typically present with only nonspecific complaints such as abdominal pain, weight loss, or anemia.…

Small Bowel Obstruction

In patients with known or suspected small bowel obstruction (SBO), the radiologist is called on to answer the following questions: Is the bowel obstructed? If so, what is the level of obstruction? What is the cause of obstruction? What is…

Malignant Tumors of the Small Bowel

Primary small bowel malignancy accounts for 0.6% of all new cancer cases, and 0.2% of cancer deaths in the United States. Despite the low incidence relative to other malignancies, the incidence of small bowel malignancy has been increasing from 1.1…

Benign Tumors of the Small Bowel

Clinical Considerations Despite a wide variety of histologic types, benign and malignant tumors of the small bowel constitute only 1% to 5% of all gastrointestinal (GI) neoplasms. , Nearly 75% of small bowel tumors discovered at autopsy are benign, while…

Malabsorption

Anatomic Classification of Malabsorption Carbohydrate digestion requires a functioning pancreas and small bowel brush border enzymes. Normal protein digestion requires adequate gastric and pancreatic function and small bowel brush border enzymes. Fat digestion requires normal hepatic, biliary, exocrine, pancreatic, and…

Other Inflammatory Conditions of the Small Bowel

The radiologist usually encounters infectious disease of the small intestine during the workup of patients with acute abdominal pain or diarrhea or with chronic diarrhea, malabsorption, and weight loss. If computed tomography (CT) reveals thickened ileal folds or regional mesenteric…