The etiologies of RVT can and should be investigated. In the study center, RVT 10 was primarily caused by nephrotic syndrome in young patients and also was attributed to 11 malignancy and lupus. In addition to anticoagulation, endovascular intervention including 12 catheter-directed thrombolysis and mechanical thrombectomy contributed to the improvement of 13 renal function in patients with acute RVT. Meanwhile, endovascular intervention markedly 14 promoted the thrombus clearance of patients in the subacute phase but did not improve renal 15 function. Therefore, endovascular intervention should be considered if RVT is diagnosed in the 16 acute phase.