scholarly journals Use of Contrast-Enhanced Ultrasonography for the Characterization of Tumor Thrombi in Seven Dogs

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1613
Author(s):  
Alessia Cordella ◽  
Pascaline Pey ◽  
Nikolina Linta ◽  
Manuela Quinci ◽  
Marco Baron Toaldo ◽  
...  
Keyword(s):  
Color Doppler ◽  
Case Series ◽  
Arterial Phase ◽  
Retrospective Case ◽  
Primary Tumors ◽  
Contrast Enhanced ◽  
Venous Phase ◽  
Contrast Enhanced Ultrasonography ◽  
Tumor Thrombi

Tumors of adrenal and thyroid glands have been associated with vascular invasions—so-called tumor thrombi, both in humans and dogs. The detection and characterization of venous thrombi is an important diagnostic step in patients with primary tumors for both surgical planning and prognosis. The aim of this study was to describe the use of contrast-enhanced ultrasonography (CEUS) for the characterization of tumor thrombi. Dogs with tumor thrombus who underwent bi-dimensional ultrasound (B-mode US) and CEUS were included. Seven dogs were enrolled in this retrospective case series. On B-mode US, all thrombi were visualized, and vascular distension and thrombus-tumor continuity were seen in three and two cases, respectively. On color Doppler examination, all thrombi were identified, seemed non-occlusive and only two presented vascularity. On CEUS, arterial-phase enhancement and washout in the venous phase were observed in all cases. Non-enhancing areas were identified in the tumor thrombi most likely representing non-vascularized tissue that could potentially be embolized in the lungs after fragmentation of the tumor thrombi. On the basis of these preliminary study, CEUS appeared to be useful for the characterization of malignant intravascular invasion.

scholarly journals Contrast-enhanced Ultrasound Features of Intrahepatic Cholangiocarcinoma: A New Perspective

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tianjiao Chen ◽  
Xiaoyan Chang ◽  
Ke Lv ◽  
Yong Wang ◽  
Xianshui Fu ◽  
...  
Keyword(s):  
Intrahepatic Cholangiocarcinoma ◽  
Color Doppler ◽  
Arterial Phase ◽  
Contrast Enhanced Ultrasound ◽  
Color Doppler Flow Imaging ◽  
Portal Venous Phase ◽  
Contrast Enhanced ◽  
Color Doppler Flow ◽  
Venous Phase ◽  
New Perspective

AbstractThe objective of this study was to illustrate our specific findings for intrahepatic cholangiocarcinoma (ICC) lesions on contrast-enhanced ultrasound (CEUS). In this study, 21 patients at our hospitals with pathologically proven ICC and CEUS data were retrospectively enrolled. General clinical data of the patients, and features of lesions on conventional and contrast-enhanced ultrasound were recorded. Two experienced radiologists retrospectively reviewed all images by consensus. On gray-scale sonography, hypoechoic, isoechoic and hyperechoic lesions accounted for 85.7%, 9.5% and 4.8%, respectively, of all lesions. Hypovascular patterns were found for 95.2% of the lesions on color Doppler flow imaging. During the arterial phase of CEUS, heterogeneous hyperenhancement, homogeneous hyperenhancement, rim-like hyperenhancement, isoenhancement and hypoenhancement were observed for 61.9%, 19.0%, 9.5%, 4.8%, 4.8% of the lesions, respectively. During the portal venous and late phases, 85.7% and 95.2% of the lesions, respectively, exhibited hypoenhancement. In addition, 66.7% of the ICC lesions exhibited washed-out interiors but little decrease in enhancement at the periphery during the portal venous phase, resulting in the formation of a hyperenhanced peripheral rim. In conclusion, the rim sign in the portal venous phase of CEUS could help diagnose ICC. This trait could be related to the infiltrating growth pattern of ICC.

scholarly journals Greyscale and contrast enhanced ultrasonography for characterization of gastric malignant tumors

2018 ◽  
Vol 1 (1) ◽  
pp. 8 ◽  
Author(s):  
Cristian Vasile Neciu ◽  
Ion Cosmin Puia ◽  
Alexandru Florin Badea ◽  
Mihai Socaciu ◽  
Emil Botan ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Malignant Tumors ◽  
Arterial Phase ◽  
Stromal Tumors ◽  
Gastric Tumors ◽  
Variable Pattern ◽  
Grey Scale ◽  
Contrast Enhanced ◽  
Contrast Enhanced Ultrasonography

Aims: To evaluate the utility of grey scale ultrasonography (US) and contrast enhanced ultrasonography (CEUS) for characterization of malignant gastric tumors.Material and methods: The study was conducted prospectively and it included a number of 30 patients with malignant gastric tumors diagnosed through upper tract endoscopy and biopsy: 25 adenocarcinomas, 3 lymphomas, and 2 stromal tumors. All the patients were examined by US, followed immediately by CEUS, using both oral and intravenous contrast agents. CEUS assessed the dynamics of the contrast agent during the arterial phase and the venous phase. The distribution characteristics of the contrast agent inside the region of interest (ROI) were also evaluated. Twenty four patients underwent surgery.Results: Adenocarcinomas presented heterogeneous enhancement with variable pattern, followed by a delayed wash-out in almost all of the situations. Lymphomas presented a variable pattern, intensity and homogeneity of the enhancement, followed by delayed wash-out. Stromal tumors showed early arterial intense and homogenous enhancement followed by moderate wash-out in venous phase.Conclusions: Grey scale US and CEUS are useful methods in characterizing gastric tumors and contribute to a more adequate evaluation of the lesions. The dynamics of the contrast agent may be suggestive for the anatomopathological nature of the tumor. Larger studies will be necessary in order to determine thepractical value of the method.

scholarly journals Diagnostic vascular ultrasonography with the help of color Doppler and contrast-enhanced ultrasonography

2016 ◽  
Vol 35 (4) ◽  
pp. 289-301 ◽  
Author(s):  
Johannes Rübenthaler ◽  
Maximilian Reiser ◽  
Dirk-André Clevert
Keyword(s):  
Color Doppler ◽  
Contrast Enhanced ◽  
Vascular Ultrasonography ◽  
Contrast Enhanced Ultrasonography

Comparative Assessment of Widefield Fundus Autofluorescence Patterns in Retinoschisis and Retinal Detachment

2020 ◽  
Vol 4 (4) ◽  
pp. 286-292
Author(s):  
Jessica L. Cao ◽  
Thais F. Conti ◽  
Grant L. Hom ◽  
Amy S. Babiuch ◽  
Tyler Greenlee ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
Imaging Modality ◽  
Fundus Autofluorescence ◽  
Case Series ◽  
Comparative Assessment ◽  
High Variability ◽  
Retrospective Case ◽  
Data Points ◽  
Sd Oct

Purpose: This article characterizes widefield fundus autofluorescence (WF-FAF) patterns in retinoschisis (RS), retinal detachment (RD), and combined retinoschisis-detachment (RS/RD), and to correlate them with spectral-domain optical coherence tomography (SD-OCT) findings. Methods: A retrospective case series of 13 eyes with senile RS, RD, or RS/RD is presented. One eye underwent imaging of 2 areas within the retina, resulting in 14 data points. Independent, masked graders classified pathology on SD-OCT as RS, RD, or RS/RD and graded WF-FAF images for either hypoautofluorescent areas or mixed autofluorescence (AF) (hyper-AF, iso-AF, hyper-AF with hypo-AF, hyper-AF with iso-AF, or hypo-AF with iso-AF). Results: There was no statistically significant correlation between the autofluorescence pattern and the type of retinal abnormality ( P = .74). Conclusions: High variability was found in the characterization of WF-FAF in patients with RS and RD. SD-OCT remains the criterion-standard imaging modality in distinguishing RS from RD in clinically ambiguous cases.

Contrast-enhanced ultrasonography (CEUS) and time/intensity curves for the characterization of small renal masses

2019 ◽  
Vol 18 (1) ◽  
pp. e897-e898
Author(s):  
A. Pili ◽  
E. Bertelli ◽  
S. Sforza ◽  
A. Mari ◽  
R. Campi ◽  
...  
Keyword(s):  
Small Renal Masses ◽  
Renal Masses ◽  
Contrast Enhanced ◽  
Contrast Enhanced Ultrasonography

Contrast-Enhanced Ultrasonography and Color Doppler: Guided Intraoperative Embolization of Intracranial Highly Vascularized Tumors

2019 ◽  
Vol 128 ◽  
pp. 547-555 ◽  
Author(s):  
Giuseppe Maria Della Pappa ◽  
Enrico Marchese ◽  
Alessandro Pedicelli ◽  
Alessandro Olivi ◽  
Luca Ricciardi ◽  
...  
Keyword(s):  
Color Doppler ◽  
Contrast Enhanced ◽  
Contrast Enhanced Ultrasonography
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