Intraspinal Iliac Venous Stent Migration with Lumbar Nerve Root Compression.

BACKGROUND: Venous stenting is a common treatment for chronic peripheral venous disease. The most frequent complications caused by this technique are stent misplacement and intracardiac or intravascular stent migration. In this publication, we will describe the first case of an intraspinal stent misplacement leading to lumbar nerve root compression.

CASE DESCRIPTION: Our patient was a 20-year-old woman with a bilateral pulmonary embolism caused by a right common iliac vein thrombosis and a severe compression of the left common iliac vein by the right common iliac artery (May-Thurner or Cockett syndrome). She underwent an endovascular stenting of the left iliac vein. A few days later, she reported some pain in the right L5 radicular and showed signs of hypoesthesia of the left leg and of paresis of the left extensor hallucis longus muscle. A lumbar computed tomography scan showed a stent misplacement into the spinal canal through the left L5 foramen with nerve root compression. She underwent a surgical removal of the stent through a unilateral L5-S1 laminarthrectomy. The postoperative follow-up showed a complete clinical recovery and a control lumbar computed tomography scan confirmed the L5 nerve root decompression.

CONCLUSIONS: The intraspinal misplacement of a venous stent is a rare complication that may cause nerve root injury. It requires a prompt treatment. Surgically removing the stent by a posterior approach seems to be a simple and safe therapeutic option.