Unformatted text preview: s of pancreas, invasion of adjacent organs, Ascites (presumtive peritoneal carcinomatosis)
Appendicitis CT features?
Distended appendix >6 mm, enhancing thickened walls, appendicolith within phlegmon or abscess
DifferentialCrohn's disease, cecal diverticulitis, perforated cecal carcinoma, mesenteric adenitis, PID
of RLQ pain without abnormal appendix or appendicolith?
Complications associated with perforated appendicitis?
Phlegmon (periappendiceal soft-tissue mass), abscess (> 3cm surgical or catheter drainage).
Mucocele of appendix?
Distended, mucus-filled appendix without inflammation. >2 cm, usually caused by mucinous neoplasm
Diverticulitis CT features?
Small, round collections of air, feces, or contrast, wall thickening, hyperemic enhancement, sinus tract or fistual formation, Abscess formation
Colitides? Ulcerative colitis, Crohn's colitis, Pseudomembranous colitis, Typhlitis, Ischemic colitis (splenic flexure, rectosigmoid) Radiation colitis, Infectious colitis, Toxic megacolon
CT features of islet cell tumors? enhance. Large tumors heterogeneous with calcification, cysts, necrosis, vascular invasion, tumor extension (generally nonfunctioning)
Small tumors (<4 cm)
Functioning isletglucagonomamalignant potential?10% insulinoma
80% cell tumors' 60% gastrinoma
CT features of pancreatic lymphoma? and weakly enhancing. Diffuse infiltrative tumor resembles pancreatitis. Peripancreatic lymphadenopathy. No or minimal dilatation of pancreatic duct. Lymphadenopathy below renal veins in lymphoma but not in pancreatic adenocarcinoma?
Focal tumor, homogeneous
Metastases to pancreas CT features?
Round or ovoid Most heterogeneous, can be diffuse, solitary, or multiple nodules
Intraductal Diffuse ormucinous neoplasmof pancreatic duct, atrophy of pancreas, cystic ectasia of branch ducts "bunch of grapes", intraductal papillary solid mass, multicystic mass.
papillary segmental dilation CT features?
Pseudocyst CT features? cystic lesion in and around pancreas, low-density collections of fluid, debris, or blood, Distinct walls with occasional calcifications, Generally unilocular, Signs of pancreatitis usually present.
Pancreatic Middle-aged women, Multiloculated cysts, 6 or less cysts > 2 cm are typical, May have calcifications, Most common in tail, Do not communicate with pancreatic duct.
mucinous cystic neoplasm CT features?
Pancreatic Benign,cystadenoma CT features?of innumerable small cysts. May have central stellate scar with central calcification. With larger cysts may have honeycomb appearance, Unilocular form indistinguishable from mucinous cystic neoplasms.
serous well-circumscribed mass
Posttraumatic cyst (most common), Congenital epidermoid cyst, Echinococcal cysts, Pancreatic pseudocyst.
Splenic microabscesses CT features? differential: lymphoma, kaposi's sarcoma, sarcoidosis, metastases.
Multiple low-density lesions,
Most common neoplasm of spleen?
Rare primary malignancy of spleen?
Multiple small focal splenicor TB.
Features ofLack of serosa, early spread, poor prognosis. 90% SCC 10% ADCA (Barrett's) Irregular wall thickening >3 mm Intraluminal polypoid mass Eccentric narrowing of lumen Proximal dilatation Metastases to lymph nodes and liver
Esophageal leiomyoma features?
Smooth, well-defined mass. Eccentric wall thickening, Leiomyosarcoma (heterogeneous, ulcerate)
Esophageal varices, CT features? nodular and tubular...
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- Winter '14
- Radiology, Metastasis