Intestinal Scleroderma
Smooth muscle is replaced by fibrous tissue • Gastrointestinal tract: Most common internal organ system involvement (80-90%) Esophagus > duodenum > anorectal > small bowel > colon • Small bowel Marked dilatation…
Imaging Approach to the Biliary System
(Left) Oblique grayscale ultrasound of gallbladder (GB) shows a distended gallbladder lumen with diffuse wall thickening , multiple gallstones , and pericholecystic fluid . Sonographic Murphy sign was positive. These…
Tuberculosis
Abdominal lymphadenopathy is most common • Lymphadenopathy (tuberculous lymphadenitis) Enlarged, centrally necrotic nodes with hypoattenuating centers and hyperattenuating enhancing rims Nodes often calcify after healing • Tuberculosis peritonitis Variables amounts of free…
Peritoneal Inclusion Cyst
Loculated cystic mass with “spiderweb” pattern due to peritoneal adhesions reflecting from ovary Fine septations throughout collection Normal ovary at center or lateral margin of cyst No solid mural or…
Groove Pancreatitis
Pure form: Affects only pancreaticoduodenal groove Segmental form: Affects pancreaticoduodenal groove and extends medially into pancreatic head • Pancreatic groove is a theoretical space defined by pancreatic head (medially), 2nd portion of duodenum…
Gastroduodenal Trauma
High-density intramural hematoma, pneumoperitoneum, anterior pararenal space fluid/air • Upper GI findings Duodenal lumen narrowing by hematoma; contrast extravasation (peritoneal cavity, retroperitoneum) • Best imaging tool: CECT, upper GI TOP DIFFERENTIAL DIAGNOSES…
Hepatic Angiomyolipoma and Lipoma
Only 50% of hepatic angiomyolipomas have substantial fat component • Arterial phase: Prominent enhancement of nonfatty portion of lesion Central vessels within lesion if mass is large • Fatty component of tumor…
Esophageal Metastases and Lymphoma
Dysphagia, weight loss, hematemesis, or asymptomatic • Esophageal metastases Direct, lymphatic, or hematogenous spread Direct invasion most common route: Gastric and lung cancer most common primary tumors • Complications GI bleeding, perforation,…
Postoperative Changes, Liver
Consider iatrogenic infarction of hepatic mass or liver parenchyma Consider retained absorbable oxidized cellulose (Surgicel) • Embolized, iodinated, poppyseed oil (Ethiodol, Lipiodol) May mimic calcified or hypervascular mass on plain radiography…
