title: Temporary occlusion test using a microcatheter.
abstract: BACKGROUND
  The balloon occlusion test (BOT) is a well-accepted technique for the treatment of large or complex aneurysms. However, this procedure may not be feasible for small arteries such as the posterior inferior cerebellar artery (PICA). We report our experience with endovascular treatment of a fusiform PICA aneurysm employing a microcatheter occlusion test.
  
  
  METHODS
  A 46-year-old male had a fusiform Type I aneurysm with irregular wall in the lateral medullary segment of left PICA. Because the BOT cannot be safely performed in the PICA, we performed a temporary occlusion test using a microcatheter.
  
  
  RESULTS
  The microcatheter occlusion test was successfully performed, and endovascular treatment was performed afterward. The patient remained symptom free after the embolization and at one-year follow-up.
  
  
  CONCLUSIONS
  The microcatheter occlusion test is an excellent option for performing an occlusion test for vessels that cannot accommodate a balloon because of their diminutive size.
authors.affiliation: Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Chi Shing
authors.initials: CS
authors.lastname: Zee
authors.forename: Xiao Long
authors.initials: XL
authors.lastname: Zhang
mesh_terms: D001157:Arterial Occlusive Diseases / Q000628:therapy*; D021721:Balloon Occlusion; D002404:Catheterization; D057785:Catheters; D002531:Cerebellum / Q000098:blood supply* / Q000601:surgery; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000473:pathology*; D002560:Cerebrovascular Circulation / Q000502:physiology; D004621:Embolization, Therapeutic / Q000379:methods*; D057510:Endovascular Procedures / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000628:therapy*; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D013525:Surgical Instruments; D014014:Tissue Adhesives; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014711:Vertebral Artery / Q000473:pathology
chemical_list: D014014:Tissue Adhesives