Lumbar Hernia
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,…
Vicarious Excretion
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 and Paralysis of the Diaphragm
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…
Mastocytosis
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…
Drug-Induced Esophagitis
Aortic arch, left main bronchus, retrocardiac • Findings on esophagram (double contrast) Solitary or localized cluster of tiny ulcers distributed circumferentially on normal background mucosa Punctate, linear, stellate, serpiginous, or ovoid;…
Colonic Metastases and Lymphoma
Intravenous contrast for CT or MR Double contrast barium enema TOP DIFFERENTIAL DIAGNOSES • Adenocarcinoma Short, focal, “apple core” lesion < 10 cm in length More likely to cause colonic obstruction…
Gastroparesis
Dilated stomach with decreased or absent peristalsis TOP DIFFERENTIAL DIAGNOSES • Gastric outlet obstruction • Postoperative state, stomach • Intestinal scleroderma • Cystic fibrosis, abdominal signs • Gastric bezoar PATHOLOGY • Idiopathic: No identifiable cause in…
Imaging Approach to the Peritoneum, Mesentery, and Abdominal Wall
Lesser omentumGreater peritoneal cavityGastrosplenic ligamentLesser sac (omental bursa)Splenorenal ligament(Top) The borders of the lesser sac (omental bursa) include the lesser omentum, which conveys the common bile duct and hepatic and…
Cricopharyngeal Achalasia
Pharyngoesophageal junction: C5-6 level • Videofluoroscopic recording: Frontal, lateral, and oblique Rapid sequence filmong required for demonstration TOP DIFFERENTIAL DIAGNOSES • Cervical osteophytes (indentation) Large anterior cervical osteophytes can impinge on pharyngoesophageal…
Duodenal Flexure Pseudotumor
At angle between bulb and descending duodenum Acute angulation as duodenum becomes retroperitoneal, accentuates fold • May even simulate ulcerated mass, with barium trapped between mucosal folds • Changeable appearance on upper…
