RESUMO
Objective To explore CT features of simple renal adipose capsule herniation (SRACH)and discuss its classification. Methods CT data of 1 8 patients with SRACH were retrospectively analyzed.Results All of the 1 8 cases occurred on the left side. SRACH could be divided into two types,thoracic and extrapleural.XGray films were negative in 1 7 cases,and 1 case in the lateral chest radiograph showed the hilly shadow in the posterior costal phrenic area.The results of CT detections presented as round,oval,and fusiform fat density masses on the paraspinal or posterior phrenic angle area with smooth margins,which extended downward to the diaphragm and were linked to the perinephric fat.Conclusion MSCT can clearly show the location of SRACH,the shape,size and density of the hernia sac,and the relationship with the renal adipose capsule,which may be helpful in confirming the diagnosis.