The diagnosis of retrocaval ureter with multi-slice helical CT

Objective:To investigate the multi-slice spiral CT(MSCT) features of retrocaval ureter and the value of MSCT in the diagnosis of retrocaval ureter, thereby improving the level of imaging diagnosis.Methods:The imaging data of CT and clinical information of 8 patients with retrocaval ureter as proved by operation were retrospectively analyzed.Results:MSCT findings of retrocaval ureter showed renal pelvis and ureter expansion in different extent.Narrow ureter bypass was located behind the inferior vena cava,which appeared as hook,radish root,or S shapes.Kidney calculi were found in two pateints.Conclusion:MSCT is of great value for the diagnosis and differential diagnosis in retrocaval ureter as well as its complications.