Etiology The exact pathogenesis of bile duct carcinoma has not been described, but predisposing factors include long-standing inflammation, parasitic infestation, toxin and drug exposures, and genetic abnormalities. It is believed…
Etiology Acute pancreatitis is an acute inflammatory disorder of the pancreas that has numerous causes ( Box 48-1 ). The most common risk factors are chronic alcohol consumption and choledocholithiasis….
Etiology Cystic lesions of the pancreas encompass a wide spectrum of different pathologic entities, ranging from developmental, to inflammatory, to neoplastic cysts. Neoplastic cystic lesions, which are the most important,…
Cirrhosis Etiology Virtually any chronic insult to the liver, if sufficiently severe and long-standing, may result in cirrhosis. In the United States, the most common causes are hepatitis C virus…
Etiology Acute mesenteric ischemia of the small bowel has four major causes: (1) arterial embolism, (2) arterial thrombosis, (3) nonocclusive mesenteric ischemia, and (4) mesenteric venous thrombosis ( Table 26-1…
Small bowel neoplasms remain a diagnostic challenge for radiologists and clinicians. The small bowel represents 75% of the total length of the gastrointestinal tract and more than 90% of the…
Normal intestinal wall thickness depends on the degree of bowel distention and the imaging modality. The normal jejunum wall thickness measures approximately 2 mm and the ileum 1 mm on enteroclysis. On…
Ultrasound Technical Aspects Ultrasound is a widely accessible, noninvasive imaging method that has many advantages over other imaging methods. It is portable and relatively inexpensive with high spatial and temporal…
Multidetector Computed Tomography Multidetector computed tomography (MDCT) has become a fundamental technique of pancreatic imaging. Today, higher image quality can be obtained in abdominal imaging, and this is even more…
Technical Aspects Colorectal cancer is the second cause of cancer deaths in the United States, second only to lung cancer in men and breast cancer in women. Colorectal cancer screening…
