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  • 1
    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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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    Hepatic metastases from leiomyosarcoma: MR features with histopathologic correlation (1997)
    Springer
    Abdominal imaging 22 (1997), S. 67 -71 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Leiomyosarcoma—Magnetic resonance imaging—Liver, neoplasms—Liver tumors, secondary. [xm [fs99]
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To determine the magnetic resonance (MR) imaging features of hepatic metastases from leiomyosarcoma and determine the pathologic basis for the MR appearance of these neoplasms. Methods: MR examinations of eight patients with a total of 16 hepatic metastases from leiomyosarcoma were retrospectively reviewed. Hepatic metastases originated from a primary gastrointestinal (n = 6), uterine (n = 1), or retroperitoneal (n = 1) leiomyosarcoma. Correlation between MR features and pathologic findings was performed in 11 metastases from which histologic material was obtained. Results: Among the 10 metastases seen on T1-weighted MR images, nine were homogeneous and one was heterogeneous. The latter contained areas of necrosis and hemorrhage on pathologic examination. Among the 16 metastases seen on T2-weighted MR images, 12 were well delineated and completely homogeneous, with a marked hyperintense signal (``hemangiomalike'' pattern). These neoplasms were composed of smooth fibrous tissue without macroscopically visible areas of necrosis on pathologic examination. The remaining four metastases were heterogeneous and contained varying degrees of necrosis and hemorrhage or gelatinous tissue. Conclusion: A hemangiomalike pattern is the most common feature on T2-weighted MR images. We found that homogeneous hyperintensity of hepatic metastases from leiomyosarcoma on T2-weighted MR image does not reflect cystic changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900142
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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
    Involvement of superior mesenteric vessels and portal vein in pancreatic adenocarcinoma: Detection with CT during arterial portography (1994)
    Springer
    Abdominal imaging 19 (1994), S. 413-416 
    Details
    ISSN: 1432-0509
    Keywords: Pancreas, carcinoma ; CT during arterial, portography ; Portal vein, angiographic study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A prospective study was designed to determine the utility of computed tomography (CT) during arterial portography (CTAP) in the detection of superior mesenteric vessels and portal vein involvement in patients with pancreatic adenocarcinoma. Eighteen patients with adenocarcinoma of the head of the pancreas and eight patients with benign pancreatic disease were investigated with CTAP, dynamic contrast-enhanced CT, and angiography. Appropriate review was made to determine presence or absence of superior mesenteric vessels and portal vein involvement. Final diagnosis was obtained in all cases by surgical explorations. The overall accuracy rate for detecting or excluding superior mesenteric vessels and portal vein involvement was 96% (25 of 26 patients) with CTAP, 88% (23 of 26 patients) with dynamic contrast-enhanced CT, and 85% (22 of 26 patients) with angiography. No statistically significant difference in accuracy was found among the three techniques. Our results suggest that the use of CTAP is not indicated in the preoperative detection of superior mesenteric vessels and portal vein involvement in patients with pancreatic adenocarcinoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206927
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Imaging features of nodular regenerative hyperplasia of the liver mimicking hepatic metastases (1999)
    Springer
    Abdominal imaging 24 (1999), S. 258-261 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Liver, neoplasms—Liver, magnetic resonance imaging—Liver, computed tomography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We described the sonographic, computed tomographic (CT), and magnetic resonance (MR) imaging features of one atypical case of nodular regenerative hyperplasia of the liver. The presence of multiple hepatic nodules suggested the diagnosis of metastatic disease to the liver because of a peripheral rim of enhancement on CT obtained after intravenous administration of contrast material and a halo sign on T2-weighted spin-echo MR imaging. Examination of the pathologic specimen obtained after surgical biopsy showed that the nodules were made of hepatocytes, with a nodular arrangement surrounded by peliosis, without fibrosis or cirrhosis. These findings suggested that peliosis may cause peripheral rim of enhancement on CT and halo sign on MR imaging. In light of this case, nodular regenerative hyperplasia of the liver should be considered in the differential diagnosis of hepatic metastases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900491
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  • 8
    Electronic Resource
    Electronic Resource
    Hepatic pseudolesion around the falciform ligament: prevalence on CT examination (1996)
    Springer
    Abdominal imaging 21 (1996), S. 324-328 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Liver, neoplasms—Liver, CT studies—Liver, pseudolesions—CT, pitfalls.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: The purpose of this study was to determine the prevalence of hepatic pseudolesions seen around the falciform ligament on computed tomography (CT) of the abdomen obtained with intravenous administration of contrast material. Methods: We first retrospectively reviewed the CT scans of six patients in whom hepatic pseudolesions were seen around the falciform ligament. The abdominal CT scans of 587 patients were then prospectively analyzed for the presence of hepatic pseudolesions around the falciform ligament to determine the prevalence of this finding on CT examinations. Results: CT scans in the first six patients showed two types of hepatic pseudolesion around the falciform ligament. In three patients, hepatic pseudolesions were focal spared areas in fatty liver. In three patients, hepatic pseudolesions were developed in nonfatty liver. Prospectively, hepatic pseudolesions were found on five of 587 CT examinations (prevalence = 1%). A single hepatic pseudolesion was found in segment 4 on two examinations. Two hepatic pseudolesions (one in segment 4 and one in segment 3) were found together on three CT examinations. Conclusion: Hepatic pseudolesions around the falciform ligament are seldom seen on CT scan. However, recognition of these pseudolesions is crucial because they may be interpreted as true tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900073
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  • 9
    Electronic Resource
    Electronic Resource
    Fluid–fluid levels within focal hepatic lesions: imaging appearance and etiology (1998)
    Springer
    Abdominal imaging 23 (1998), S. 161-165 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Computed tomography, neoplasms—Liver, neoplasms—Neoplasm, liver—MR, liver.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Purpose: To report our experience with fluid–fluid levels within focal hepatic lesions and determine if this finding indicates a specific diagnosis. Materials and methods: We reviewed our experience with eight patients with focal hepatic lesions that showed fluid–fluid level on cross-sectional imaging. Seven CT scans, four MR examinations, and four sonograms were reviewed. The hepatic lesions included metastases (four patients), biliary cystadenoma (two patients), cavernous hemangioma (one patient), and hematoma (one patient). A histologic diagnosis was made in all cases. Results: Fluid–fluid levels were found in both malignant and benign focal hepatic lesions. Fluid–fluid levels were seen on six CT scans, four MR examinations and on none of the four sonograms. Radiologic–pathologic correlation showed that fluid–fluid levels corresponded to internal hemorrhage in all but one case. In the case of cavernous hemangioma, a fluid–fluid level was found to correspond to a sedimentation effect within a large vascular space. Conclusion: Fluid–fluid levels in focal hepatic lesions do not indicate a specific diagnosis but can be seen in both malignant and benign conditions affecting the liver.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900312
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  • 10
    Electronic Resource
    Electronic Resource
    Macrocystic serous cystadenoma of the pancreas:CT and endosonographic features (1999)
    Springer
    Abdominal imaging 24 (1999), S. 72-74 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Pancreas, CT—Pancreas, imaging studies—Pancreas, cysts—Pancreas, neoplasms.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Recently, the term ``serous cystadenoma'' has been adopted in the pathological community to qualify the so-called microcystic adenoma of the pancreas. This change in terminology was based on the emergence of a new type of serous cystadenoma of the pancreas, i.e., the macrocystic variant. We report one case of pathologically proven macrocystic serous cystadenoma of the pancreas for which the diagnosis of mucinous cystadenoma was suggested preoperatively. This rare but benign macrocystic variant exhibits radiological features similar to those of mucinous cystadenoma. In addition, inflammatory changes and foci of hemorrhage within the tumor may simulate mucinous cystadenocarcinoma. RID=""ID=""〈e5〉Correspondence to:〈/e5〉 P. Soyer
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900444
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