Anatomic Features Of Left Renal Vein Depicted On MSCT And The Tips In CIinical Diagnosis Of Nutcracker Syndrome

ObjectiveTo depict the normal anatomic features of left renal vein(LRV),mesenteric artery(SMA) with multi-slice spiral CT(MSCT),to access its clinical value in diagnosis of nutcracker syndrome(NCS).Methods220consecutive patients were selected as study group of normal population, who were undergone contrast MSCT examination on abdomen with some symptoms except that of related nutcracker syndrome(NCS).The diameter and sectional area of LRV, the angle between AA and SMA (AMA) were measured and analyzed, as well as the body mass index (BMI).The anatomic morphology of LRV on axial CT images were analyzed and classified into3types. The post-processing technique included multi-planar reformation(MPR),maximum intensity projection (MIP).Another3cases ever confirmed NCS were selected as analyzing reference.ResultsThe AMA was56.67±18.27±2.23mm,6.50±2.31mm respectively; the sectional area of LRV on distened and narrowed portion were119.81±+43.03mm2,86.47±41.27mm2respectively. There was no obvious correlation between BMI and AMA, but there was in some degree certain positive correlation. Conclusion:It can be the normal common findings on MSCT that the LRV was shown some degree compressed in SMA portion. NCS was an comprehensive clinical diagnosis, not only based on imaging fidings, MSCT findings can recomend the possibility of NCS,or rule out the possibility of NCS.