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  • 1
    Electronic Resource
    Electronic Resource
    Chondromyxosarcoma: a rare form of bone neoplasm in children (1987)
    Springer
    Pediatric radiology 17 (1987), S. 429-431 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The case described is interesting for its unusual presentation related to its uncommon onset in youth and its revelation by a fracture which led to a first erroneous pathological diagnosis. In fact, retrospective analysis of the CT showing peripheral condensation could suggest the malignant chondroïd nature of the tumor [4]. Subsequent radiological follow-up demonstrated the rapid growth of the tumor hence exhibiting a very invasive form [5]. Myxoïd differentiation is commonly related to aggressive chondrosarcoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396626
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  • 2
    Electronic Resource
    Electronic Resource
    Intrahepatic bile duct dilatation secondary to hepatocellular carcinoma: CT features in 10 patients (1995)
    Springer
    Abdominal imaging 20 (1995), S. 114-117 
    Details
    ISSN: 1432-0509
    Keywords: Liver, CT study ; Hepatocellular carcinoma ; Bile ducts obstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: To determine the computed tomographic (CT) features of bile duct obstruction secondary to hepatocellular carcinoma (HCC). Methods: CT examinations of 10 patients (mean age, 58 years) with bile duct obstruction secondary to HCC were retrospectively reviewed. Results: All tumors were intrahepatic. Eight tumors were well-delineated and two were ill-defined. The largest diameters of tumor ranged from 1.5–6.0 cm (mean, 3.6 cm). All tumors were hypodense before contrast and did not contain calcification. After contrast, four tumors became hypodense, three were isodense, and three were hyperdense to the liver. No tumor demonstrated encapsulation. Diffuse intrahepatic bile duct dilatation was observed in seven patients. One patient had extrahepatic bile duct dilatation. Localized bile duct dilatation was observed in three patients, in the hemi-liver which contained the tumor. No tumor invaded the portal vein. Conclusion: Although rare, HCC should be included in the differential diagnosis of bile duct obstruction. This diagnosis should be suggested in patients with bile duct obstruction when CT shows an associated intra- or extrahepatic mass. Our results suggest that HCC responsible for bile duct obstruction is remarkable for the absence of encapsulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201516
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  • 3
    Electronic Resource
    Electronic Resource
    MR imaging of intrahepatic cholangiocarcinoma (1995)
    Springer
    Abdominal imaging 20 (1995), S. 126-130 
    Details
    ISSN: 1432-0509
    Keywords: Cholangiocarcinoma, MR imaging ; Liver, neoplasms ; Bile ducts, carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The purpose of this study was to determine the magnetic resonance (MR) features of intrahepatic cholangiocarcinoma. Methods: MR imaging studies of seven cases of pathologically proven intrahepatic cholangiocarcinoma were retrospectively reviewed. Results: On MR images the tumors presented as a single mass (N = 5) or multiple nodules (N = 2), as welldelineated (N = 5) or ill-defined (N = 2), and as non-encapsulated (N = 7). Mean tumor diameter ranged from 6–14 cm (mean, 10 cm). On T1-weighted (TR/TE = 400–600/10–17 msec) images, the tumors were hypointense compared to the liver. The five tumors studied with dynamic MR imaging showed progressive centripetal filling-in after intravenous administration of a gadolinium chelate. On T2-weighted (TR/TE = 2000–2500/80–100 msec) images, all tumors were hyperintense compared to the liver; five were markedly hyperintense and two moderately hyperintense. Vascular encasement, bile duct dilatation within the tumor, and central scar were depicted on MR images in four, three, and two tumors respectively. Conclusion: The typical MR appearance of intrahepatic cholangiocarcinoma is a large well-delineated nonencapsulated tumor associated with intrahepatic venous encasement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201519
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  • 4
    Electronic Resource
    Electronic Resource
    MRI of Budd-Chiari syndrome (1994)
    Springer
    Abdominal imaging 19 (1994), S. 325-329 
    Details
    ISSN: 1432-0509
    Keywords: Budd-Chiari syndrome ; MR study ; Liver, MR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A retrospective study was undertaken to reassess the various magnetic resonance imaging (MRI) features of Budd-Chiari syndrome (BCS). MRI examinations of 22 patients with pathologically confirmed BCS were studied. Spin-echo (SE) T1- (TR = 300–450 ms/TE = 12–15 ms), and SE T2-weighted (TR = 1600–2000 ms/TE = 30–60/90–120 ms) MRI images were obtained in all patients. Gradient-recalled-echo (GRE) images (TR = 7–60 ms/TE = 3–19 ms, flip angle = 10–40°) were obtained in 14 patients. MRI showed thrombosis of three or two hepatic veins in 19 (86%) and 3 (14%) patients, respectively. Spontaneous intrahepatic anastomoses was depicted in five (23%) patients. Ascites appeared in 15 patients (68%). Thrombosis or external compression of the inferior vena cava (IVC) by an enlarged caudate lobe was depicted in six (27%) and five (23%) patients, respectively. Prominent azygos and hemiazygos veins were demonstrated in seven (32%) patients (six of whom had thrombosis of the IVC). MRI showed hepatomegaly in all patients and enlarged caudate lobe in 18 (82%) patients. SE T1- and SE T2-weighted MRI images revealed inhomogeneous signal intensity of hepatic parenchyma in 14 (64%) patients. SE T1- and SE T2-weighted MRI images showed homogeneous signal intensity of hepatic parenchyma in eight (36%) patients. Our results demonstrate that BCS displays various features on MRI images, and such information is important for diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198189
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  • 5
    Electronic Resource
    Electronic Resource
    Bile duct involvement in hepatocellular carcinoma: MR demonstration (1995)
    Springer
    Abdominal imaging 20 (1995), S. 118-121 
    Details
    ISSN: 1432-0509
    Keywords: Liver, MR study ; Hepatocellular carcinoma ; Bile ducts obstruction ; Bile ducts, MR studies ; Liver, neoplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: To determine the magnetic resonance (MR) features of hepatocellular carcinoma (HCC) with associated bile duct involvement. Methods: MR examinations of six patients (mean age, 62 years) demonstrating bile duct involvement due to HCC were retrospectively reviewed and compared to surgical and pathologic findings. Results: Three of the tumors were solitary, and three were multifocal. In two patients, MR showed direct biliary duct invasion by tumor. On T1-weighted MR images, four tumors were hypointense compared to the liver and two were isointense. On T2-weighted MR images, four tumors were hyperintense, and two were isointense. The two tumors studied with dynamic T1-weighted MR images obtained after intravenous administration of a gadolinium chelate, displayed enhancement similar to that of the liver. There was no evidence of a tumor capsule on either unenhanced or enhanced MR images. Intrahepatic bile duct dilatation was seen in five patients. The extrahepatic bile duct was normal in all cases. Conclusion: Although rare, HCC should be included when considering the etiology of intrahepatic bile duct obstruction. Imaging features suggestive of the diagnosis by MR include intrabiliary tumor or bile duct obstruction with an associated hepatic mass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201517
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  • 6
    Electronic Resource
    Electronic Resource
    Renal carcinoma: diagnosis of venous invasion with Gd-enhanced MR venography (2000)
    Springer
    European radiology 10 (2000), S. 1138-1143 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Magnetic resonance – Renal carcinoma – Staging – Venous invasion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to evaluate the usefulness of gadolinium-enhanced time-of-flight magnetic resonance venography (MRV) in the diagnosis of bland thrombosis/tumoral invasion in the preoperative assessment of renal cell carcinoma. Preoperative precontrast and enhanced GRE fast low-angle shot (FLASH) images of 36 patients with renal adenocarcinoma were reviewed and compared with pre- and post-contrast T1-weighted images. All patients underwent surgery, and MR findings were blindly and prospectively compared with surgical and pathologic data, considered the standard. Renal vein and vena cava were involved in 17 and 9 patients, respectively; right atrial extension was present in one patient. Precontrast spin-echo (SE) and FLASH images were 88 % sensitive and 100 % specific in the detection of venous involvement, respectively, and enhanced FLASH images 100 % sensitive and 96 % specific. The nature of thrombus (neoplastic or bland) was more accurately assessed (McNemar's, p 〈 0.05) with FLASH-enhanced MR images (sensitivity 89 %; specificity 96 %) than with SE and precontrast FLASH images (sensitivity 79 %; specificity 94 %). Our data suggest that use of Gd-enhanced MRV might improve preoperative assessment of vascular involvement in renal carcinoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003309900296
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  • 7
    Electronic Resource
    Electronic Resource
    Benign solitary neurinomas of the sciatic popliteal nerves CT study (1991)
    Springer
    Neuroradiology 33 (1991), S. 186-188 
    Details
    ISSN: 1432-1920
    Keywords: CT ; Popliteal fossa, tumors ; Schwannomas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two cases of solitary benign neurinomas of the sciatic popliteal nerves are reported. Computed tomography (CT) confirmed the clinically suspected diagnosis of a tumor of nervous origin, and provided accurate preoperative location of these tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588267
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  • 8
    Electronic Resource
    Electronic Resource
    Spontaneous intracerebral hematomas from vascular causes (1991)
    Springer
    Neuroradiology 33 (1991), S. 291-295 
    Details
    ISSN: 1432-1920
    Keywords: CT, brain studies ; Hematoma, intracerebral ; Vascular malformations, CT ; Vascular malformations, angiography ; Statistical studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The aim of the present study was to assess the diagnostic accuracy of CT in determining the underlying causes of brain hematomas with a state-of-the art CT. For this purpose, CT and angiographic data of 149 subjects with spontaneous intracerebral hematomas (ICH) were statistically compared in a blind, retrospective study, taking angiography, supported when possible by surgical findings, as providing the correct diagnoses. 5 groups were distinguished on the basis of CT data: 103 patients with isolated deep ICH had normal angiograms; 9 patients with isolated superficial ICH and 8 with deep ICH and intraventricular hemorrhage (IVH) had arteriovenous malformations (AVMs). 4 with this combination showed no angiographic abnormalities, one had an aneurysm. 14 subjects with ICH and subarachnoid hemorrhage (SAH) had a middle cerebral or carotid artery aneurysm; and 10 with ICH, SAH and IVH had also an aneurysm, in 7 on the anterior communicating artery. Sensitivity, specificity, positive and negative predictive values were respectively: for AVMs 100, 96, 77 and 100%; and for aneurysms 96, 100, 100 and 99%. Kendall coefficient was 0.95, indicating close correlation between the two modalities. This study confirms that CT can accurately predict the likelihood, nature and location of vascular ICHs. It indicates whether angiography is necessary or not, and if so, what vascular tree ought to be explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587808
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  • 9
    Electronic Resource
    Electronic Resource
    Magnetic resonance angiography (MRA) of the circle of Willis: a prospective comparison with conventional angiography in 54 subjects (1994)
    Springer
    Neuroradiology 36 (1994), S. 193-197 
    Details
    ISSN: 1432-1920
    Keywords: Circle of Willis, functional studies ; Circle of Willis, anatomy ; Cerebral angiography ; Magnetic resonance angiography ; Brain, ischaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We prospectively correlated the findings of magnetic resonance angiography (MRA) with those of transfemoral four-vessel angiography in 54 patients to investigate the direction of flow within the circle of Willis. Our primary goal was to assess the direction of flow using the size of the vessel and signal intensity, without saturation techniques. Analysis of the circle of Willis, especially the communicating arteries, was performed double-blind by two groups of two radiologists. Three types of arteries were identified: high flow or cross-cerebral circulation, patent and nonvisualised arteries. Cerebral angiography was the standard for comparison between the two methods. MRA did not reveal any arteries invisible on angiography, thus providing a specificity of 100%. The sensitivity of MRA was 89.2% for the anterior and 81.3% for the posterior communicating arteries, and 100% for the anterior, middle and posterior cerebral arteries. MRA was shown to be a useful technique for the assessment of patency of the circle of Willis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588129
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  • 10
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    Dramatic Recovery in Acute Ischemic Stroke Is Associated With Arterial Recanalization Grade and Speed [Original Contributions] (2012)
    American Heart Association (AHA)
    In: Stroke
    Details
    Publication Date: 2012-10-23
    Description: Background and Purpose— Dramatic recovery (DR) is a predictor of stroke outcome among others. However, after successful recanalization, systematic favorable outcome is not the rule. We sought to analyze the impact of recanalization on DR in patients with acute ischemic stroke eligible for any revascularization strategies (either intravenous or endovascular). Methods— We analyzed data collected between April 2007 and May 2011 in our prospective clinical registry. All patients with acute ischemic stroke with National Institutes of Health Stroke Scale ≥10 at admission and an identification of arterial status before treatment were included. DR was defined as National Institutes of Health Stroke Scale ≤3 at 24 hours or a decrease of ≥10 points within 24 hours. Results— DR occurred in 75 of 255 patients with acute ischemic stroke (29.4%). Patients with persistent occlusion had a low DR rate (11.1%) than those with no documented occlusion (36.5%) and those with occlusion followed by recanalization (35.3%; both P 〈0.001). Among patients with recanalization monitored by angiography, DR was higher among patients with complete recanalization than among those with partial recanalization (46.8% versus 14.3%; P 〈0.001) and increased with tertiles of time to recanalization ( P trend =0.002). In multivariable logistic regression analysis, grade and time to recanalization appeared independently associated with DR; the adjusted ORs were 4.17 (95% CI, 1.61–10.77) for complete recanalization and 1.24 (95% CI, 1.04–1.48) for each 30-minute time decrease. Patients with versus without DR more frequently had modified Rankin Scale ≤1 (67.6% versus 9.0%; P 〈0.001) and less frequently had hemorrhage (17.3% versus 33.9%; P =0.024). Conclusions— DR is strongly associated with favorable clinical outcome and is dependent on complete recanalization and time to recanalization.
    Keywords: Acute Stroke Syndromes, Thrombolysis
    Print ISSN: 0039-2499
    Electronic ISSN: 1524-4628
    Topics: Medicine
    Published by American Heart Association (AHA)
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