Pressure necrosis of bowel lumen (rectum or sigmoid) by fecal mass IMAGING • CECT to evaluate for perirectal and intraperitoneal complications Fecaloma: Entirely intraluminal mass Calcification or high-density matter in or…
Can be found in intrahepatic or extrahepatic ducts and range in size from a few mm (most common) to a few cm Tumors may secrete mucin: Wide-open ampulla of Vater…
Enlarged ileocecal valve with smooth or lobulated surface contour Stellate folds may radiate into center of mass Oblique images: Terminal ileum entering ICV • CT IC valve leaflets appear thickened with…
No enhancement on CECT Calcification may be seen • MR characteristics are secondary to low cellularity, vascularity, and water content of lesion Low signal intensity on all sequences (T1WI and T2WI)…
Distal duodenum and jejunum are most often involved, with distal small bowel/ileum involved in severe cases Thickened, irregular folds with sand-like micronodules Small bowel lumen may be normal or mildly…
“Eosinophilic gastroenteritis” is a misnomer; can affect any portion of GI tract • Requires 4 criteria for diagnosis Presence of GI symptoms Biopsy proof of eosinophilic infiltration of 1 or more…
Can occur in either superior lumbar triangle of Grynfeltt-Lesshaft or inferior lumbar triangle of Petit – Superior lumbar triangle of Grynfeltt-Lesshaft defined by 12th rib superiorly, superior border of internal oblique inferiorly,…
High-density material within gallbladder (GB) – CT > 10x more sensitive than radiographs in detecting slight differences in density – Mild to moderate opacification of GB bile on day after CECT or…
Eventration: Diaphragmatic contour is eccentric, with upward bulging of affected portion of diaphragm – Usually anteromedial aspect of right hemidiaphragm Paralysis: Asymmetric elevation of involved hemidiaphragm with basal atelectasis • US Sonography…
Peptic ulcer disease and malabsorption Duodenum and SB: Thick folds, fast transit Mucosal nodularity (2-3 mm sand-like nodules) – Fluid-distended lumen of SB • Hepatomegaly (40% of adult cases) • Biliary tree: Infiltration…
