The hepatic storage disorders are genetic conditions characterized by the accumulation of toxic substances within either hepatocytes or the hepatic extracellular matrix. This deposition causes secondary tissue damage, which may…
Etiology Vascular lesions of the colon are an important medical problem and have now been recognized as a significant cause of gastrointestinal bleeding. They can be solitary or multifocal, benign…
Etiology The causes of the development of colorectal carcinoma and its precursor lesion, the colonic adenoma, are multifactorial and include both genetic predisposition and environmental insults. Risk factors for colorectal…
Conventional Imaging Technical Aspects Before cross-sectional imaging, the double-contrast enema was the foremost radiologic method for detection of colonic mucosal lesions and precancerous polyps. Diagnostic high-quality double-contrast barium enema examination…
Etiology Colonic inflammation may be caused by numerous processes and is typically thought of as colitis. Some inflammatory conditions of the colon such as diverticulitis and epiploic appendagitis also represent…
Malignant Mucosal Processes Etiology A wide range of benign disease processes can affect the mucosa of the stomach, including inflammatory, infectious, hereditary, and autoimmune processes. What these processes have in…
The focus of this chapter is on positron emission tomography (PET) and PET and computed tomography (PET/CT) applications specific to the tumors arising in the gastrointestinal tract and female gynecologic…
Technical Aspects Radionuclide gastric emptying studies (scintigraphy) remain the most widely used method for evaluation of gastric function. Radiopharmaceuticals Gastric emptying scintigraphy is most commonly performed with technetium-99m ( 99m…
Etiology The presence of extraluminal air in an acutely ill patient with abdominal pain is an ominous sign that usually indicates perforation of a hollow viscus. Common causes include gastroduodenal…
Technical Aspects Technique The patient is given sodium bicarbonate/dimethicone granules (Carbex), a gas-producing agent, to swallow and then drinks the E-Z HD 250% weight/volume 60 mL barium. Spot views of the…
