BACKGROUND Spontaneous spinal epidural hematoma is a rare neurosurgical emergency.CASE SUMMARY A 53-year-old healthy woman suffered from complete paraplegia in both legs and loss of all sensation below the xiphoid pro...BACKGROUND Spontaneous spinal epidural hematoma is a rare neurosurgical emergency.CASE SUMMARY A 53-year-old healthy woman suffered from complete paraplegia in both legs and loss of all sensation below the xiphoid process.She was diagnosed as acute spontaneous thoracic epidural hematoma caused by an intraspinal lymphangioma.The primary lab survey showed all within normal limits.Presence of a posteriorly epidural space-occupying lesion at the T4-T8 level of the spinal canal was confirmed on magnetic resonance imaging.A decompressive laminectomy was performed from the T4 to T7 levels at the sixth hour following abrupt onset of complete paraplegia.The lesion was confirmed as lymphangioma.This patient recovered well within one month.CONCLUSION This study reports a case of acute spontaneous thoracic epidural hematoma caused by an intraspinal lymphangioma with well recovery after surgical intervention.展开更多
The choice that a solid system“makes”when adopting a crystal structure(stable or metastable)is ultimately governed by the interactions between electrons forming chemical bonds.Here we analyze six prototypical binary...The choice that a solid system“makes”when adopting a crystal structure(stable or metastable)is ultimately governed by the interactions between electrons forming chemical bonds.Here we analyze six prototypical binary transition metal compounds and shed light on the connection between Mott physics and the behavior of the energy as a function of the spatial arrangement of the atoms in these systems.Remarkably,we find that the main qualitative features of this complex behavior in the Mott phase of these systems can be traced back to the fact that the strong d-electron correlations influence substantially the charge transfer mechanism,which,in turn,controls the electrostatic interactions.This result advances our understanding of the influence of strong correlations on the crystal structure,opens a new avenue for extending structure prediction methodologies to strongly correlated materials,and paves the way for predicting and studying metastability and polymorphism in these systems.展开更多
文摘BACKGROUND Spontaneous spinal epidural hematoma is a rare neurosurgical emergency.CASE SUMMARY A 53-year-old healthy woman suffered from complete paraplegia in both legs and loss of all sensation below the xiphoid process.She was diagnosed as acute spontaneous thoracic epidural hematoma caused by an intraspinal lymphangioma.The primary lab survey showed all within normal limits.Presence of a posteriorly epidural space-occupying lesion at the T4-T8 level of the spinal canal was confirmed on magnetic resonance imaging.A decompressive laminectomy was performed from the T4 to T7 levels at the sixth hour following abrupt onset of complete paraplegia.The lesion was confirmed as lymphangioma.This patient recovered well within one month.CONCLUSION This study reports a case of acute spontaneous thoracic epidural hematoma caused by an intraspinal lymphangioma with well recovery after surgical intervention.
基金N.L.,T.-H.L.and V.D.were partially supported by the NSF grant DMR-1410132the National High Magnetic Field Laboratory.N.L.was also supported by the VILLUM FONDEN via the Centre of Excellence for Dirac Materials(Grant No.11744).
文摘The choice that a solid system“makes”when adopting a crystal structure(stable or metastable)is ultimately governed by the interactions between electrons forming chemical bonds.Here we analyze six prototypical binary transition metal compounds and shed light on the connection between Mott physics and the behavior of the energy as a function of the spatial arrangement of the atoms in these systems.Remarkably,we find that the main qualitative features of this complex behavior in the Mott phase of these systems can be traced back to the fact that the strong d-electron correlations influence substantially the charge transfer mechanism,which,in turn,controls the electrostatic interactions.This result advances our understanding of the influence of strong correlations on the crystal structure,opens a new avenue for extending structure prediction methodologies to strongly correlated materials,and paves the way for predicting and studying metastability and polymorphism in these systems.
