TY - BOOK AU - Armonda, Rocco A AU - Chang, Jason J AU - Dowlati, Ehsan AU - Liu, Ai-Hsi AU - Mai, Jeffrey C AU - Sur, Samir TI - Treatment of In-Stent Stenosis Following Flow Diversion of Intracranial Aneurysms with Cilostazol and Clopidogrel SN - 2093-9043 PY - 2021/// KW - IN PROCESS -- NOT YET INDEXED KW - MedStar Washington Hospital Center KW - Neurosurgery KW - Neurosurgery Residency KW - Radiology KW - Surgery/Surgical Critical Care KW - Case Reports N2 - In-stent stenosis is a feared complication of flow diversion treatment for cerebral aneurysms. We present 2 cases of patients treated with pipeline flow diversion for unruptured cerebral aneurysms. Initial perioperative dual antiplatelet therapy (DAPT) consisted of standard aspirin plus clopidogrel. At 6-month follow-up cerebral angiography, the patients were noted to have developed significant in-stent stenosis (63% and 53%). The patients were treated with cilostazol and clopidogrel for at least 6 months. Subsequent angiography at 1-year post-treatment showed significant improvement of the in-stent stenosis from 63% to 34% and 53% to 21%. The role of cilostazol as treatment of intracranial in-stent stenosis has not been previously described. Cilostazol's vasodilatory effect and suppression of vascular smooth muscle proliferation provides ideal benefits in this setting. Cilostazol plus clopidogrel may be a safe and effective alternative to standard DAPT for treatment of in-stent stenosis following flow diversion and warrants further consideration and investigation UR - https://dx.doi.org/10.5469/neuroint.2021.00290 ER -