(一)在200例尸体解剖中发现2例双下腔静脉,为1±0.2％;一例借奇静脉回流的下腔静脉异常,为0.5±0.5％。 (二)双下腔静脉均系双侧上主静脉肾下段存留而成。借奇静脉回流的下腔静脉异常,系右上主静脉全部存留而成。 (三)双下腔静脉第一号的发生因素可能由右髂总动脉、右肾动脉压迫所致。双下腔静脉第二号因破坏较大未作描述。借奇静脉回流的下腔静脉异常可能由于下腔静脉肝后段的不发育,肝静脉与右下主静脉上端间失却联系而上主静脉肾下段的血液不得不循原路流经该静脉肾上段所成的奇静脉所致。 (A) Two cases of double-inferior vena cava were found in 200 cases of autopsy, which was 1 ± 0.2%. One case of abnormal venous return of inferior vena cava was 0.5 ± 0.5%. (B) of the double inferior vena cava on both sides of the main vein from the lower left renal graft. Inferior vena cava reflux of the inferior vena cava abnormalities, the Department of the upper right main vein all survived. (C) the occurrence of double inferior vena cava number one may be caused by the right common iliac artery, right renal artery compression. Double inferior vena cava No. 2 is not described due to greater damage. Inferior vena cava reflux of the inferior vena cava anomalies may be due to the development of the inferior vena cava in the posterior segment of the hepatic veins and right lower main vein between the upper extremity loss of contact and the lower part of the blood flow in the lower anterior superior vena cava through the venous kidney Caused by the azygos vein on the upper section.