A Case of Inferior Vena Cava Filter Thrombus on a Retrieval Hook of the Filter

Abstract

A 50s woman was admitted to our hospital for the treatment of acute myocarditis. The patient developed acute pulmonary thromboembolism and an inferior vena cava filter was placed. It was thought that deep vein thrombi were formed due to large hysteromyomas. Retrieval of the filter was avoided because of residual thrombi in the right femoral vein and pulmonary arteries. Administration of warfarin was discontinued after a hysterectomy; subsequently, a spherical thrombus was formed on the retrieval hook of the filter. This thrombus may cause pulmonary thromboembolism in a chronic phase after inferior vena cava filter placement.