抄録
A 67-year-old man visited our hospital with complaints of swelling and pain of the right lower extremity. Ultrasonography and CT scan found thrombi from the popliteal vein to the common femoral vein. We diagnosed deep vein thrombosis (DVT) in the right lower extremity. Furthermore, CT scan detected a left-sided inferior vena cava and “right-sided” iliac vein compression syndrome. We suspected that the etiology of this DVT was these morphological anomalies.