LATE COMPLICATION OF A GREENFIELD FIL TER ASSOCIATING CAUDAL MIGRATION AND PERFORATION OF THE ABDOMINAL-AORTA BY A RUPTURED STRUT

We report the case of a 67-year-old woman who was admitted for surgica l removal of a Greenfield filter that had been inserted 7 years before because of recurrent deep vein thrombosis associated with pulmonary e mbolism. This complication appeared on a plain abdominal radiogram tha t showed a 7 cm distal migration of the filter, a 30-degree angulation , and rupture of a strut at the level of the hub. Computed tomography, aortography, and ascending cavography demonstrated that the inferior vena cava was perforated by the struts and that the ruptured strut had penetrated the infrarenal aorta. As demonstrated by scanning electron microscopy, the fracture was due to a structural defect of the strut at its insertion point within the hub, with no sign of corrosion. Ener gy-dispersive radiography analysis failed to demonstrate impurity in t he metal composition.