title: Incidence and Characteristics of Remote Intracerebral Hemorrhage After Endovascular Treatment of Unruptured Intracranial Aneurysms.
abstract: OBJECTIVE
  The purpose of this study was to investigate the incidence and characteristics of remote intracerebral hemorrhage (ICH) after endovascular treatment (EVT) of unruptured intracranial aneurysms (UIAs).
  
  
  METHODS
  Between March 2007 and September 2015, 11 patients with remote ICH from a series of 2258 consecutive patients with 2597 UIAs treated via EVT were identified. Baseline demographic characteristics, medical history, radiologic imaging data, characteristics of remote ICH, and clinical outcomes were retrospectively reviewed. The characteristics of patients with remote ICH were compared with those of patients without remote ICH.
  
  
  RESULTS
  All hematomas were single lesions located in the subcortical white matter as lobar-type in 9 patients (81.8%) and in the basal ganglia in 2 patients (18.2%). Events occurred mostly within 1 week and up to 3 weeks after EVT. Hematoma was located on the ipsilateral side in 8 patients (72.7%) and in the contralateral side in 3 patients (27.3%). Compared with patients without remote ICH, there were more aneurysms located on the internal carotid artery (ICA) (P = 0.041), more patients treated with stents (P < 0.001), more patients with hypertension (P = 0.026), and poorer clinical outcomes at discharge (P < 0.001) for patients with remote ICH.
  
  
  CONCLUSIONS
  The incidence of remote ICH after EVT of UIAs was 0.46%. This event occurred mostly in patients with stents, hypertension, and UIAs on the ICA. It presented mostly as an ipsilateral lobar-type hemorrhage within 1 week after the procedure. This complication should not be neglected because of its poor clinical outcomes.
authors: Department of Neurosurgery, Inje University Seoul Paik Hospital, Seoul, Republic of Korea.
authors: Sook Young
authors: SY
authors: Sim
authors: Department of Neurosurgery, Konyang College of Medicine, Konyang University Hospital, Daejeon, Republic of Korea.
authors: Jihye
authors: J
authors: Song
authors: Department of Neurosurgery, Inha University College of Medicine, Incheon, Republic of Korea.
authors: Se-Yang
authors: SY
authors: Oh
authors: Department of Neurosurgery, Gachon University Gil Medical Center, Incheon, Republic of Korea.
authors: Myeong Jin
authors: MJ
authors: Kim
authors: Department of Neurosurgery, Ajou University College of Medicine, Suwon, Republic of Korea.
authors: Yong Cheol
authors: YC
authors: Lim
authors: Department of Neurosurgery, Incheon St. Mary's Hospital, The Catholic University of Korea, Incheon, Republic of Korea.
authors: Sang Kyu
authors: SK
authors: Park
authors: Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
authors: Yong Sam
authors: YS
authors: Shin
authors: Department of Neurosurgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea; Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Seoul, Republic of Korea. Electronic address: ns.joonho.chung@gmail.com.
authors: Joonho
authors: J
authors: Chung
mesh_terms: D000368:Aged; D002543:Cerebral Hemorrhage / Q000000981:diagnostic imaging* / Q000453:epidemiology; D057510:Endovascular Procedures / Q000009:adverse effects* / Q000639:trends; D005260:Female; D006801:Humans; D015994:Incidence; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging* / Q000453:epidemiology; D011446:Prospective Studies; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: Cerebral aneurysm; Cerebral hemorrhage; Complication; Endovascular treatment; Remote intracerebral hemorrhage; Stent-assisted coiling