Calcified inferior vena cava thrombus in a fetus: Perinatal imaging
- [Show abstract] [Hide abstract] ABSTRACT: We have used a scanning tunneling microscope to measure both the topography and potential distribution in a current-carrying polycrystalline YBaâCuâOâminus//ital x// thin film. We find steps in the potential indicative of insulating inhomogeneities in the material which occur at boundaries between clusters of grains. These results provide the first direct correlation between the microstructure and the normal-state transport properties in these materials. The implications of these results for models used to explain the nature of superconductivity in polycrystalline high-temperature superconductors are discussed.0Comments 0Citations
- [Show abstract] [Hide abstract] ABSTRACT: Thanks to the wider use of sonography to examine the spinal content in the neonate, normal anatomy and anomalies may be detected easily. Yet, unusual sonographic patterns are also observed. These must be differentiated from true pathologies. During a prospective study of 103 neurologically asymptomatic neonates, atypical sonographic patterns were found in 16 patients, corresponding to normal variants in 13. Nine of these 13 patients presented with a widening of the distal part of the central echo complex (one had a dilated ventriculus terminalis). Nerve roots of the cauda equina were disposed asymmetrically in three patients; the spinal cord movements were still present. In two of these babies, this distribution was associated with thin arachnoid pseudocysts. One patient presented with transitorily hyperechoic and narrow subdural spaces, probably related to neonatal dehydration. None of the 13 patients showing normal variants required any treatment. The other 3 patients (of 16) presented with equivocal entities of unknown evolution: sonographic tethered cord, fibrolipoma of the filum terminale and epidural varices. Sonography is highly accurate in evaluating the spinal cord content and aids differentiation of normal and normal variants from equivocal or pathological entities.0Comments 15Citations
- [Show abstract] [Hide abstract] ABSTRACT: Abnormal connexion of the umbilical vein in the inferior vena cava was diagnosed in a fetus at 18 weeks' gestation. Associated anomalies included nuchal and axillary lymphangiectasia, hypertrophic cardiomyopathy and hepatomegaly. Neonatal death occurred after spontaneous vaginal delivery at 25 weeks. A review of the literature summarizes the diagnostic criteria and associated anomalies.0Comments 5Citations
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