Catheter-Directed Thrombolysis for Massive Pulmonary Embolism Resulting from Thrombosis in a Duplicated Inferior Vena Cava: A Case Report. 
Pulmonary embolism (PE) associated with duplicated inferior vena cava (IVC) is rare, and there are no reports of this condition treated with catheter-directed thrombolysis.  We present the case of a 54-year-old man who developed massive PE caused by thrombi in a duplicated IVC that detached during transcatheter angiography.  After implantation of a retrievable filter in the common IVC, the patient underwent catheter-directed thrombolysis.  He was asymptomatic at discharge, with complete resolution of thrombosis and successful retrieval of the filter.  The patient had an uneventful 9-month follow-up with no further complications.