PubMed Health⌕ Search

Biomedical subjects

Y Menu

Publications and source records attributed to Y Menu.

47 records · Page 3Linked to original sources
PubMed1986

[Magnetic resonance imaging in the study of pulmonary hilar involvement].

A retrospective analysis of results of magnetic resonance imaging (MRI) was conducted in 28 patients with uni- or bilateral pulmonary hilum lesions and findings compared with those of computed tomography (CT). All abnormal hilar masses examined were between 1 and 5 cm in diameter and were easily detected by transverse axial imaging. Contrast of their images was very high in relation to hilar bronchovascular elements in the two types of spin echo sequence with a short TR (0.5-0.7 s) and a long TR (1.5-2 s). Differentiation between tumoral or adenopathies and vessels was simpler than with CT with intravenous contrast. For screening of possible extension of hilar tumors. MRI appears to be superior to CT for providing data on vascular relations of lesions but inferior to CT for determining bronchial relations. Mediastinal extension of hilar tumors is easily defined by the short TR sequence but MRI supplies data of greater value than CT only in a low proportion of cases and then partly as a result of complementary coronal and sagittal imaging.

Adult↗
PubMed1985

Budd-Chiari syndrome: US evaluation.

Twelve patients with proved Budd-Chiari syndrome (eight acute and four chronic cases) were examined, using real-time ultrasonography (US). In all acute cases, US study showed at least one hepatic vein with findings suggestive of the syndrome, such as stenosis, dilatation, thick wall echoes, thrombosis, abnormal course, or extrahepatic anastomosis. In chronic cases, hepatic veins were usually not visible. Modifications of liver morphology were present in all patients except those with recent onset of the disease. Caudate lobe hypertrophy was present in only six cases. US study is therefore the procedure of choice for initial diagnosis of acute Budd-Chiari syndrome. Pitfalls were the failure to detect two caval thromboses and one hepatic vein web. Cavography should still be performed systematically, but hepatic phlebography is useful in selected cases only.

Adult↗
PubMed1985

Sonographic and computed tomographic evaluation of intrahepatic calculi.

Intrahepatic calculi in non-Asian patients were studied by sonography and computed tomography (CT). Three patients were studied by CT cholangiography also. In two cases, the calculi were consecutive to Caroli disease, and in two others, the biliary stones were formed proximal to a stenosis of a previous surgical anastomosis. Five patients spontaneously developed intrahepatic calculi. All sonograms were abnormal. Image specificity was good, even when bile ducts were not dilated, if appropriate technique allowed identification of a double-arc-shadow pattern. Sonography strongly suggested the diagnosis in eight patients and was nonspecific in only one. On CT, calculi had various densities, and they were not visible in two patients. CT cholangiography was not particularly helpful. Finally, CT added little more information when performed after sonography. Both examinations strongly underestimate the number of stones, and direct cholangiography remains indicated if surgery is planned.

Adult↗
PubMed1985

Liver adenomatosis. An entity distinct from liver adenoma?

From 1979 to 1984, we followed the cases of 3 men (aged 13, 31, and 75 yr) and 2 women (aged 38 and 45 yr who had never used oral contraceptives) suffering from liver adenomatosis, an uncommon lesion consisting of numerous benign adenomas in an otherwise normal hepatic parenchyma. During the same period, we observed 20 cases of liver adenoma (one tumor in 18 patients and two tumors in 2 patients). From these cases and the review of previously reported cases of liver adenomatosis and series of liver adenoma, the following distinctive characteristics of these two benign conditions of the liver can be outlined: liver adenomatosis affects men and women, whereas liver adenoma predominantly affects women; liver adenomatosis is unrelated, whereas liver adenoma is closely related, to oral contraceptive use; increases in serum alkaline phosphatase and gamma-glutamyl transpeptidase are common in liver adenomatosis, but are uncommon in liver adenoma.

Adenoma↗
PubMed1985

[Value of the sitting position for studying suprahepatic veins by ultrasonography].

Ultrasound imaging of suprahepatic veins was conducted in 50 patients in the sitting and lying down positions and under the same respiratory conditions. Results showed that the sitting down position was frequently useful during exploration of suprahepatic veins, and it should be performed whenever visibility in the lying down position in unsatisfactory.

Hepatic Veins↗
PubMedDate not supplied

Epithelioid hemangioendothelioma of the liver: MR and CT findings.

The MR imaging features in five patients with hepatic epithelioid hemangioendothelioma (EHE) were correlated with CT and pathologic findings. Two hemangioendotheliomas appeared as multiple nodular lesions with a predominantly peripheral location in the liver. In three more extensive cases, the tumors formed confluent peripheral lesions with macroscopic invasion of portal or hepatic veins (n = 3), signs of portal hypertension (n = 3), and nodular hypertrophy of uninvolved liver (n = 2). These findings, suggestive of EHE, were well demonstrated by MR imaging and CT. The internal architecture of the tumors was clearly depicted on T2-weighted MR images. Viable tumor peripheries appeared moderately hyperintense relative to liver. The center of the tumors consisted of one or several concentric zones. Hyperintense central zones were composed of loose, edematous connective tissue. Hypointense zones contained mainly coagulation necrosis, calcifications, and scattered hemorrhages. Except for the presence of calcifications, the internal architecture of EHE was better defined by MR imaging than by CT.

Adolescent↗
PubMedDate not supplied

[Pancreatic cystadenomas. Pitfalls and limitations of radiologic diagnosis].

Pancreatic cystadenoma (CA) are rare tumors. According to the classification described by Compagno and Oertel, microcystic and macrocystic CA are differentiated. The former is a benign tumor with slow growth, but the latter has a malignant potential. According to the literature, these tumors may be differentiated on the basis of US and CT findings in a high percentage of cases. We report a series of 11 cases (5 microcystic CA, 4 mucinous CA, 1 leiomyoblastoma and 1 adrenal cyst) representing all cases of radiologically suspected CA and all cases of histologically proved CA. A correct diagnosis of microcystic CA was possible in 2 out of 5 cases, and in 3 out of 4 cases of mucinous CA. The 2 extra-pancreatic tumors were misinterpreted as mucinous CA. No patient had a false positive diagnosis of microcystic CA. The diagnosis of mucinous CA was made in 7 cases, but only 3 were true positives. There was 1 false negative of mucinous CA. In other cases, laparotomy and resection are mandatory as sonography and CT cannot accurately detect malignancy or differentiate pancreatic CA from adjacent sites tumors.

Adult↗