Radiology Key

 a.k.a. von Meyenburg complex  Asymptomatic and of no clinical concern IMAGING • Multiple, near water density/intensity liver lesions < 15 mm in diameter  Varied enhancement based on cystic and solid components…

 Accounts for 5-15% of colonic adenomas IMAGING • Polypoid lesion with nodular or frond-like surface on BE or CT colonography • Location: Rectosigmoid > cecum > ascending colon > stomach > duodenum…

 Cystic or linear collections of gas in subserosal or submucosal layers of GI tract wall • Pneumatosis intestinalis: Most common form of intramural gas, found in SB more often than colon…

(Left) Graphic shows the ventral pancreatic anlagen developing as an outpouching of the hepatic-biliary diverticulum. As the stomach and duodenum elongate, the ventral pancreas and bile ducts rotate clockwise and…

 Usually simple in appearance, but may rarely have internal debris, blood products, etc.  No identifiable capsule/peripheral enhancement • MR: Usually well-defined fluid collection, which is T2WI hyperintense and T1WI hypointense  Hepatobiliary…

 Most often solid, but can have variable internal cystic components and intratumoral hemorrhage • Capsule enhances on CECT and T1 C+ MR and appears as rim of low T2 signal intensity…

 CT shows diverticula as outpouchings from colonic wall, filled with gas or feces  Circular muscle hypertrophy (myochosis coli) causes irregularly spaced indentations and narrowing of lumen of colon TOP DIFFERENTIAL…

 Site of presentation may depend partially on transplanted organ  Extranodal (80%) > nodal involvement (20%) • Imaging findings of post-transplant lymphoproliferative disorder parallel those of non-Hodgkin lymphoma (NHL) in immunocompetent patients…

 CT: Linear high-density foci within dilated biliary tree  US: Tubular echogenic structure, 3-6 mm in diameter, with central anechoic area (digestive tract of worm) • Clonorchiasis: Flukes typically involve peripheral intrahepatic ducts,…

 Can be solitary (73%),  multiple (10%), or diffusely infiltrative (15%)  Enhancement pattern mimics primary tumor – Hypervascular: Most commonly renal cell cancer (RCC) – Hypovascular: Lung, breast, colon, melanoma  Concomitant intraabdominal metastases…