1、The Diaphragmatic Crura and Retrocrural SpaceNormal Imaging Appearance, Variants, and Pathologic ConditionsGuo Xiaochao2010.7.22RadioGraphics 2008;28:1289-1305The Diaphragmatic Crura and ReThe retrocrural space (RCS) is a small triangular region within the most inferior posterior mediastinum bordere

2、d 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.Th

3、e retrocrural space (RCS) is膈肌腳及膈腳后間隙(english)課件Anatomic ConsiderationsDiaphragm and Diaphragmatic CruraLymph Nodes, Cisterna Chyli, and Thoracic Duct 52% at lymphangiography; 1.7% at CT; 15%96% at MRAortaAzygos and Hemiazygos VeinsParavertebral Venous Plexus valvelessSympathetic Trunk and Splanchni

4、c NervesAnatomic ConsiderationsDiaphra膈肌腳及膈腳后間隙(english)課件膈肌腳及膈腳后間隙(english)課件Cisterna Chyli & Thoracic DuctCisterna Chyli & Thoracic DuctParavertebral Venous PlexusParavertebral Venous PlexusCongenital diaphragmatic hernia Bochdalek hernia(95%) Morgagnis hernia(2%) Partial duplication of the diaphr

5、agmDiscontinuity of the diaphragmCongenital Anomalies of the IVCAnatomic Variants and AnomaliesCongenital diaphragmatic herni膈肌腳及膈腳后間隙(english)課件膈肌腳及膈腳后間隙(english)課件Abnormalities of the CruraAbnormalities of the CruraLymphadenopathy NeoplasmsForegut MalformationsVascular DisordersInfammatory Conditi

6、onsInfectionsOther AbnormalitiesAbnormalities of the RCSLymphadenopathy Abnormalities Lymphadenopathy (6mm)Lymphadenopathy (6mm)NeoplasmsThese can be categorized according to their cell of origin into neurogenic, mesenchymal, germ cell, and lymphoid tumors.Neurogenic tumorsganglion cell tumorsnerve sheath tumorsparagangliaNeoplasmsThese can be categori膈肌腳及膈腳后間隙(english)課件膈肌腳及膈腳后間隙(english)課件膈肌腳及膈腳后間隙(english)課件Vascular DisordersVascular DisordersInfammatory ConditionsRetroperitoneal fbrosisSteroid-induced retrocrura