Relevant Anatomy and Embryology Fibropolycystic Disorders Anomalies may occur during the embryologic development of the ductal plate that surrounds the portal vein in fetal life. Depending on the stage of fetal development at which these defects occur, a variety of…
KEY FACTS Imaging Multiplanar, contrast-enhanced CT is optimal imaging test Protocol advice Intravenous contrast for CT or MR Double contrast barium enema Lymphoma Bulky colonic mass; without colonic obstruction Preservation of fat planes Metastasis May mimic primary adenocarcinoma on imaging…
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KEY FACTS Terminology Autosomal dominant genetic disorder characterized by formation of innumerable colonic adenomatous polyps at young age and increased risk for colonic and extracolonic tumors Imaging Imaging tests : Double-contrast barium studies of colon and upper GI tract (may…
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KEY FACTS Imaging Imaging is critical for detection, diagnosis, staging, and follow-up of colorectal carcinoma (CRC) Detection : CT colonography, plus stool analysis Complementary role with standard colonoscopy Early cancer: Sessile or pedunculated polyp Advanced cancer: "Saddle" or "apple core"…
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KEY FACTS Terminology Blunt or penetrating injury to rectum or colon Imaging Transverse and descending colon are most common sites for blunt traumatic injury Rectum is most common site for penetrating injury Best diagnostic clue Colonic wall thickening with adjacent…
KEY FACTS Terminology Ogilvie syndrome, colonic pseudoobstruction, adynamic ileus, functional obstruction Acute: Reversible, occurring with severe medical illness and major surgeries Chronic: Constipation, no etiology for ileus, and repeated obstructive symptoms You’re Reading a Preview Become a Clinical Tree membership…
KEY FACTS Terminology Cecal volvulus : Rotational twist of right colon on its axis, resulting in progressive distention and potential ischemia Cecal bascule Cecum is distended and lumen narrowed by medial folding and displacement, without a twist You’re Reading a…