Anticoagulant Therapy in a Pregnant Woman with May-Thurner Syndrome.

A 39-year-old woman with a 9-week abdominal pregnancy noted pain in her lower abdomen and left leg. Since successive thrombi were observed extending from the left common iliac vein to the popliteal vein along with a thrombus in the left pulmonary artery, we diagnosed her with pulmonary thromboembolism with deep venous thrombosis (DVT). May-Thurner syndrome may have contributed to DVT in the left leg when the left iliac vein was compressed by the right iliac artery. She underwent anticoagulant therapy with heparin, followed by the subcutaneous injection of heparin at home after discharge. We herein report the case of a pregnant woman with May-Thurner syndrome who safely gave birth.