Post-percutaneous nephrolithotomy pseudo aneurysm formation treated by coil embolization; A study of seven cases

Renal artery pseudoaneurysm is a rare complication of percutaneous nephrolithotomy (PCNL) with symptoms of flank pain and hematuria. Endovascular coil embolization has been proposed as a safe management option. We report Seven male patients, aged 36 to 65 years, with post-PCNL pseudoaneurysms presenting as gross hematuria. They all underwent CT angiography prior to endovascular intervention. The access was from common femoral artery in 6 cases and from left brachial artery in one case. Selective angiography of affected renal artery and branches were performed by suitable catheter. Coil embolization was performed by MicroNester and MReye coils (Cook, Inc.). Size of coils was selected based on angiography results. Completion angiography revealed embolized pseudoaneurysm in all cases. Gross and microscopic hematuria disappeared in all patients in the following days. Endovascular angioembolization with coil is an effective technique for managing post-PCNL pseudoaneurysms in renal artery and its branches.