Body CT Flash Cards

Adnexal torsion cases involve mass benign cystic

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Unformatted text preview: ed with high-density fluid (advanced-pyosalpinx), Complex adnexal fluid collections (abscess). Adnexal torsion, cases involve mass (benign cystic teratoma, hydrosalpinx, functional cyst), Thickening fallopian tube wall, ascites, deviation of uterus to affected side Most CT features? Testicular cancer lymph node involvement? Gonadal lymphatics (testicular veins and renal hilar nodes), external iliac chains to para-aortic nodes. Inguinal nodes involved only when scotrum invaded. Aberrant right subclavian branch (diverticulum of Kommerell), courses behind esophagus Left arch, last artery? Two types of right aortic arch? Right arch with aberrant left subclavian, Mirror image right arch (almost always associated with congenital heart disease). Double aortic arch? ring with dysphagia, no innominate artery (subclavians and carotids come off separately) Vascular Ascending atherosclerosis, Marfan's syndrome, cystic medial necrossi, syphilis, aortic valvular disease aortic aneurysm causes? 3 common Aortic rootforlevel oftrauma? locations aortic ligamentum arteriosum diaphragm and aortic hiatus Stanford aortic dissection types? Type A--involves ascending aorta (treated surgically: possibility of retrograde dissection and rupture within pericardium or occlusion of coronary or carotid arteries), Type B--Do not involve arch, arise distal to left subclavian artery (treated medically). DeBakey's Type I--entire aorta, Type II--ascending aorta only, Type III--descending aorta only aortic dissection types? Three mediastinum compartments? subaortic mediastinum, paracardiac mediastinum supra-aortic mediastinum, Mediastinal spaces and recesses? Pretracheal space, Prevascular space, Superior pericardial recess, Azygoesophageal recess, Subcarinal space Persistent left superior vena cava features? Lateral to left common carotid artery, enters coronary sinus posterior to left atrium. Failure of cardinal vein to regress, Azygos or hemiazygos continuation of IVC? Hemiazygos (polysplenia), Azygos (asplenia), dilated azygos, hemiazygos systems, Diaphragmatic IVC drains hepatic veins only. Causes of SVC syndrome? bronchogenic carcinoma, sarcoidosis, fibrosing mediastinitis, tuberculosis, mediastinal radiation. Most commonly Pulmonary>3 cm, diameter in pulmonary hypertension? artery or > ascending aorta Difference Pulmonic stenosis--main and left pulmonary arteries dilated. Pulmonary hypertension--mian, left, and right pulmonary arteries dilated. in pulmonary dilatation in pulmonary hypertension and pulmonic stenosis? Acute PE versus PE--clot PE at CT?in lumen, outlined by contrast [doughnut sign (cross section) and railroad track sign (same plane)], Chronic PE--clot adherent to wall, located peripherally. acute chronic centered Acute pancreatitis CT findings? Enlargement decrease in density blurring of margins peripancreatic stranding blurring of fat planes thickening of retroperitoneal fascia Complications ofcollections Pseudocysts Necrosis (lack of enhancement) Phlegmon (mass of edema and inflammation) Abscess Hemorrhage Pseudoaneurysms Thrombosis (splenic vein) ascites Fluid acute pancreatitis? Chronic pancreatitis features? Causes (alcohol, autoimmune, tropical pancreatitis) Calcifications 50% Atrophic Duct strictured and dilated segments, "beaded" Pseudocysts CT features of pancreatic adenocarcinoma? hypodense mass 96% head > body > tail Signs of pancreatic pancreatic mass resectability?sign without mass Isolated adenocarcinoma Double duct Signs of pancreatic adenocarcinoma unresectability? Involvement of major arteries or veins. Extension of tumor beyond margin...
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