Left portal vein pseudothrombus: A pitfall on contrast medium-enhanced computed tomography

1996 ◽  
Vol 3 (4) ◽  
pp. 154-157
Author(s):  
Ronald H. Wachsberg ◽  
Cheemun Lum
Keyword(s):  
Computed Tomography ◽  
Portal Vein ◽  
Contrast Medium ◽  
Left Portal Vein ◽  
Enhanced Computed Tomography

scholarly journals Value of preoperative computed tomography for meso-Rex bypass in children with extrahepatic portal vein obstruction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Huiying Wu ◽  
Ning Zhou ◽  
Lianwei Lu ◽  
Xiwen Chen ◽  
Tao Liu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Portal Vein ◽  
Predictive Value ◽  
Extrahepatic Portal Vein Obstruction ◽  
Portal Vein Obstruction ◽  
Left Portal Vein ◽  
History Of ◽  
Associated Malformations ◽  
Sensitivity Specificity

Abstract Background Extrahepatic portal vein obstruction (EHPVO) is the most important cause of hematemesis in children. Intrahepatic left portal vein and superior mesenteric vein anastomosis, also known as meso-Rex bypass (MRB), is becoming the gold standard treatment for EHPVO. We analyzed the value of preoperative computed tomography (CT) in determining whether MRB is feasible in children with EHPVO. Results We retrieved data on 76 children with EHPVO (50 male, 26 female; median age, 5.9 years) who underwent MRB (n = 68) or the Warren procedure (n = 8) from 2013 to 2019 and retrospectively analyzed their clinical and CT characteristics. The Rex recess was categorized into four subtypes (types 1–4) depending on its diameter in CT images. Of all 76 children, 7.9% had a history of umbilical catheterization and 1.3% had leukemia. Sixteen patients (20 lesions) had associated malformations. A total of 72.4% of Rex recesses could be measured by CT, and their mean diameter was 3.5 ± 1.8 mm (range 0.6–10.5 mm). A type 1, 2, 3, and 4 Rex recess was present in 9.2%, 53.9%, 11.8%, and 25.0% of patients, respectively. MRB could be performed in patients with types 1, 2, and 3, but those with type 4 required further evaluation. The sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of CT were 100%, 83.8%, 42.1%, 100%, and 85.5%, respectively. Conclusions Among the four types of Rex recesses on CT angiography, types 1–3 allow for the performance of MRB.

scholarly journals Contrast-enhanced computed tomography of the liver, gall bladder and urogenital tract in female red-eared terrapins (Trachemys scripta elegans)

2017 ◽  
Vol 62 (No. 12) ◽  
pp. 674-680 ◽  
Author(s):  
V. Sochorcova ◽  
P. Proks ◽  
E. Cermakova ◽  
Z. Knotek
Keyword(s):  
Computed Tomography ◽  
Gall Bladder ◽  
Contrast Medium ◽  
Bladder Wall ◽  
Post Contrast ◽  
Contrast Medium Administration ◽  
Contrast Enhanced ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography ◽  
Contrast Studies

The aim of the present study was to evaluate the feasibility of contrast-enhanced computed tomography for organ morphology and perfusion in five captive terrapins. Native scans were performed and afterwards an iodinated non-ionic contrast media was manually administered through the jugular vein catheter. Post-contrast CT scans were taken 20 (T<sub>20</sub>), 60 (T<sub>60</sub>) and 180 (T<sub>180</sub>) seconds after the contrast medium administration. Maximum contrast enhancement of the kidneys and the liver was detected at T<sub>20</sub> and T<sub>60</sub>, respectively. The gall bladder content, the urinary bladder content and ovarian follicles were all without contrast enhancement in all five terrapins. Gall bladder wall thickness was 0.9 mm in all terrapins. Enhancement of the gall bladder wall in post-contrast studies was considered excellent, good or poor in two terrapins, two terrapins and one terrapin, respectively, with a mean score of 1.8 ± 0.84 over all contrast studies. Enhancement of the ureters in post-contrast studies was considered excellent in all terrapins in all contrast studies. Peak aortic enhancement was reached 20 seconds after contrast medium administration with the peak enhancement of 213.5 ± 41 HU in four terrapins and 560 HU in one terrapin. Peak hepatic vein enhancement after contrast medium administration was recorded 20 and 60 seconds in two and three terrapins, respectively. In conclusion, contrast-enhanced computed tomography proved to be a valuable method for clinical examination of the liver, gall bladder, kidneys, ureters, urinary bladder and ovarian follicles in red-eared terrapins.

Spontaneous Resolution of a Descending Aortic Dissection

1989 ◽  
Vol 30 (3) ◽  
pp. 305-306 ◽  
Author(s):  
B. Thorvinger ◽  
U. Albrechtsson
Keyword(s):  
Computed Tomography ◽  
Natural History ◽  
Aortic Dissection ◽  
Contrast Medium ◽  
False Lumen ◽  
Complete Healing ◽  
Spontaneous Resolution ◽  
History Of ◽  
Enhanced Computed Tomography

The natural history of an aortic dissection is either endothelialization of the false lumen forming a so-called double-barrelled aorta, or thrombosis of the sack leading to fibrosis and scarring. Complete healing of an aortic dissection is extremely rare, and has to our knowledge only been reported once in vivo. Here we report a second case of spontaneous resolution of an aortic dissection, disclosed by contrast medium enhanced computed tomography.

Computed Tomography with 3d Reconstructions in Planning Two Stage Hepatectomy ALPPS for Alveococcosis of the Liver (Case Report)

2018 ◽  
pp. 81-86 ◽  
Author(s):  
А. Башков ◽  
A. Bashkov ◽  
Ю. Удалов ◽  
Yu. Udalov ◽  
Ж. Шейх ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Portal Vein ◽  
Hepatic Artery ◽  
Abdominal Cavity ◽  
Diagnostic Information ◽  
3D Reconstructions ◽  
Liver Insufficiency ◽  
The Future ◽  
Left Portal Vein

Purpose: To provide case report of alveococcosis of the liver, when ALPPS procedure was planned based on diagnostic information and 3D reconstructions of computed tomography. Material and methods: Computed tomography with bolus intravenous administration of 100 ml of contrast media Ultravist-370 was performed on multislice computed tomography Aquilion 64 Toshiba. Results: The preoperative planning is the crucial part of treatment to minimize or exclude liver insufficiency after resection. The minimal volume of remnant of the liver should be more than 25–30 % for normal parenchyma and more than 40 % in case of chronic pathologic diffuse process in the liver for example steatosis or cirrhosis. If the estimated volume of remnant is not enough to perform resection, two staged hepatectomy should be planned. According to CT data, the parenchyma of segment S2 and most of parenchyma S3, which together constitute the so-called lateral sector of the liver, were preserved. It allowed to plan an extended right-sided resection. However, the volume of the future liver remnant was 410 ml – about 30 % of the functioning part of the liver which was considered insufficient in view of the presence of prolonged biliary hypertension and a decreasing density of the parenchyma. Vascular elements of the left lateral sector – left hepatic artery, left hepatic vein and inferior vena cava were intact, however, there was a possibility of involving the wall of the left portal vein, due to its prolonged contact with the surface of the parasitic lesion. Using the segmentation tool on radiology workstation, a 3D surface model of the liver was built, where the localization of the pathologic lesion and its relationship with the main vessels were visually demonstrated. After preoperative preparation, a decision was made to perform ALPPS procedure. At the first stage intraoperative the adhesion of the parasitic lesion with the left portal vein was confirmed, which required its resection and plastic. Also in addition to the usual volume of the operation, an atypical resection of the S3 segment and Roux-en-Y choledochojejunostomy were performed. On the 7th day after the 1st stage, a control CT scan was performed, at which an increase in the volume of the remnant to 630 ml (46 % of the preserved parenchyma of the liver) was recorded. The hepatic artery, portal and hepatic veins of the future liver remainder were enhanced homogenously; drainage was traced in the area of parenchyma dissection after the second, l stage of the operation, CT was performed in 15 days to exclude liquid accumulations in the abdominal cavity and to assess the condition of the remnant due to a moderate increasing of the level of direct bilirubin up to 98 μmol/l. No pathological changes in the abdominal cavity were revealed, only free pleural effusion was observed in the pleural cavities with partial atelectasis of the lower lobes of the lungs. After conservative therapy the liver insufficiency was resolved. On the 20th day after the operation, the patient was discharged. Conclusion: In the described clinical case, computed tomography with 3D reconstructions made possible to obtain complete diagnostic information that was necessary for the surgeon to assess the resectability of the pathological process and to plan the type of surgical intervention.

scholarly journals Absence of the Horizontal Portion of the Left Portal Vein Diagnosed by Ultrasound and Computed Tomography

2021 ◽  
Vol 5 (4) ◽  
pp. 321
Author(s):  
Cheng, MM Yanling ◽  
Liu, MD, PhD Xi ◽  
Zhu, BM Wenxiao ◽  
Gao, BM Chuang ◽  
Sun, BM Hao ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Portal Vein ◽  
Left Portal Vein ◽  
Horizontal Portion

scholarly journals Contrast-enhanced computed tomography angiography and volume-rendered imaging for evaluation of cellophane banding in a dog with extrahepatic portosystemic shunt

2011 ◽  
Vol 82 (2) ◽  
Author(s):  
H. Yoon ◽  
Y. Choi ◽  
H. Han ◽  
S. Kim ◽  
K. Kim ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Portal Vein ◽  
Bile Acids ◽  
Computed Tomography Angiography ◽  
Single Phase ◽  
Reference Ranges ◽  
Post Surgery ◽  
Contrast Enhanced ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography

A 4-year-old, 1.8 kg, male, castrated Maltese was presented for evaluation of urolithiasis. Urinary calculi were composed of ammonium biurate. Preprandial and postprandial bile acids were 44.2 and 187.3 μmol/ , respectively (reference ranges 0–10 and 0–20 μmol/ , respectively). Single-phase contrast-enhanced computed tomography angiography (CTA) with volume-rendered imaging (VRI) was obtained. VRI revealed a portocaval shunt originating just cranial to a tributary of the gastroduodenal vein and draining into the caudal vena cava at the level of the epiploic foramen. CTA revealed a 3.66 mm-diameter shunt measured at the level of the termination of the shunt and a 3.79 mm-diameter portal vein measured at the level between the origin of the shunt and the porta of the liver. Surgery was performed using cellophane banding without attenuation. Follow-up single-phase CTA with VRI was obtained 10 weeks after surgery. VRI revealed no evidence of portosystemic communication on the level of a cellophane band and caudal to the cellophane band. CTA demonstrated an increased portal vein diameter (3.79–5.27 mm) measured at the level between the origin of the shunt and the porta of the liver. Preprandial and postprandial bile acids were 25 and 12.5 μmol/ , respectively (aforementioned respective reference ranges), 3 months post-surgery. No problems were evident at 6 months.

New observations of soft tissue sarcomas with contrast medium-enhanced computed tomography

1985 ◽  
Vol 9 (3) ◽  
pp. 187-193 ◽  
Author(s):  
Beverly G. Coleman ◽  
Charles B. Mulhern ◽  
Peter H. Arger ◽  
Soroosh Mahboubi ◽  
Jane Chatten ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Contrast Medium ◽  
Soft Tissue Sarcomas ◽  
Enhanced Computed Tomography

CONTRAST MEDIUM-ENHANCED COMPUTED TOMOGRAPHY FOR EVALUATING ISCHEMIC HEART DISEASE

1980 ◽  
Vol 4 (4) ◽  
pp. 571 ◽  
Author(s):  
M. J. Lipton ◽  
B. H. Brundage ◽  
P. W. Doherty ◽  
R. Herfkens ◽  
W. H. Berninger ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Heart Disease ◽  
Ischemic Heart Disease ◽  
Contrast Medium ◽  
Ischemic Heart ◽  
Enhanced Computed Tomography
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