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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,The Diaphragmatic Crura and Retrocrural Space,Normal Imaging Appearance, Variants, and Pathologic Conditions,Guo Xiaochao,2010.7.22,RadioGraphics 2008;28:1289-1305,The Diaphragmatic Crura and Re,The retrocrural space (RCS) is a small triangular region within the most inferior posterior mediastinum bordered by the two diaphragmatic crura.,Multiplanar imaging modalities allow evaluation of the RCS as part of routine examinations.,Normal structures within the retrocrural region include the aorta, nerves, the azygos and hemiazygos veins, the cisterna chyli with the thoracic duct, fat, and lymph nodes.,The retrocrural space (RCS) is,膈肌脚及膈脚后间隙(english)课件,Anatomic Considerations,Diaphragm and Diaphragmatic Crura,Lymph Nodes,Cisterna Chyli, and Thoracic Duct,52% at lymphangiography; 1.7% at CT; 15%96% at MR,Aorta,Azygos and Hemiazygos Veins,Paravertebral Venous Plexus,valveless,Sympathetic Trunk and Splanchnic Nerves,Anatomic ConsiderationsDiaphra,膈肌脚及膈脚后间隙(english)课件,膈肌脚及膈脚后间隙(english)课件,Cisterna Chyli & Thoracic Duct,Cisterna Chyli & Thoracic Duct,Paravertebral Venous Plexus,Paravertebral Venous Plexus,Congenital diaphragmatic hernia,Bochdalek hernia(95%) Morgagnis hernia(2%),Partial duplication of the diaphragm,Discontinuity of the diaphragm,Congenital Anomalies of the IVC,Anatomic Variants and Anomalies,Congenital diaphragmatic herni,膈肌脚及膈脚后间隙(english)课件,膈肌脚及膈脚后间隙(english)课件,Abnormalities of the,Crura,Abnormalities of the Crura,Lymphadenopathy,Neoplasms,Foregut Malformations,Vascular Disorders,Infammatory Conditions,Infections,Other Abnormalities,Abnormalities of the,RCS,Lymphadenopathy Abnormalities,Lymphadenopathy,(6mm),Lymphadenopathy (6mm),Neoplasms,These can be categorized according to their cell of origin into,neurogenic,mesenchymal,germ cell, and,lymphoid tumors,.,Neurogenic tumors,ganglion cell tumors,nerve sheath tumors,paraganglia,NeoplasmsThese can be categori,膈肌脚及膈脚后间隙(english)课件,膈肌脚及膈脚后间隙(english)课件,膈肌脚及膈脚后间隙(english)课件,Vascular Disorders,Vascular Disorders,Infammatory Conditions,Retroperitoneal fbrosis,Steroid-induced retrocrural lipomatosis,Spondylosis deformans,Pancreatic pseudocysts,Infammatory ConditionsRetroper,Infections,Diabetes, immunosuppression, intravenous drug abuse, anemia, and urinary tract infections,InfectionsDiabetes, immunosupp,Conclusions,Despite the small area that encompasses the RCS, there is a wide variety of pathologic conditions within this region, which is located at the posterior confnes of the inferior thorax and upper abdomen.,An understanding of the anatomy, the normal variants, and the multiple pathologic conditions affecting the diaphragmatic crura and retrocrural structures facilitates the diagnosis of disease.,ConclusionsDespite the small a,
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