Azygos vein thrombosis despite rivaroxaban therapy in a patient with breast cancer: A rare entity

Key message

In the light of this case, azygos and hemiazygos veins should be evaluated carefully in thorax CT scans. This rare case is also important in terms of the occurrence of AVT in a patient receiving rivaroxaban therapy. The outcomes and recurrence rates of these patients should also be reported for the decision of anticoagulant treatment.

Abstract

Azygos vein thrombosis (AVT) is an extremely rare type of venous thromboembolism. It is commonly associated with predisposing factors such as azygous vein aneurysm and malignancy including cholangiocarcinoma and renal cell carcinoma. Here we report a rare case of AVT associated with metastatic breast cancer.