title: An uncommon case of spontaneous resolution of mural thrombus causing symptomatic severe stenosis of the extracranial part of the internal carotid artery.
abstract: OBJECTIVE
  Etiology of ischemic stroke(IS) remains sometimes unexplained in younger subjects. Its well-known causes are atherosclerosis(AS), embolization, arterial dissection, congenital defects, vasculitides, smoking, use of oral contraceptives, coagulopathy and arterial dissection, or vasospasm.
  
  
  METHODS
  A 54-year old male subject was examined because of motor disturbance in his left upper extremity. Computerized tomography(CT) of the brain did not detect any focal pathological changes. Utrasonographic(USG) examination revealed severe stenosis of the right internal carotid artery(ICA) caused by hypoechogenic material, the blood velocity beyond the stenosis was 240 cm/s. The USG finding was confirmed by digital subtraction angiography (DSA). Based on the results of these examinations, an acute carotid endarterectomy (CEA) was indicated. During CEA the vascular surgeon observed patency of the ICA with only small calcified AS plaque on its posterior side. Ultrasonographic examination, performed on the 5(th) day, showed a small calcified AS plaque on the posterior side of the right ICA.
  
  
  CONCLUSIONS
  In conclusion, if we exclude the possibility of a false positivity of 2 imaging methods at once, we have encountered a very unusual case of SR of stenosing material in the extracranial part of the ICA, initially causing its severe stenosis manifesting by acute neurological symptomatology. The mechanism of this SR remains unclear and the problem should be further studied, preferably using less invasive AG methods.
authors.affiliation: Stroke Center, Departments of Neurology, University Hospital, Olomouc, Czech Republic. naklo@email.cz
authors.forename: Milan
authors.initials: M
authors.lastname: Labonek
authors.forename: Daniel
authors.initials: D
authors.lastname: Sanak
authors.forename: Roman
authors.initials: R
authors.lastname: Herzig
authors.forename: Stanislav
authors.initials: S
authors.lastname: Burval
authors.forename: Petr
authors.initials: P
authors.lastname: Bachleda
authors.forename: Ivanka
authors.initials: I
authors.lastname: Vlachova
authors.forename: Petr
authors.initials: P
authors.lastname: Hlustik
authors.forename: Petr
authors.initials: P
authors.lastname: Kanovsky
mesh_terms: D002545:Brain Ischemia / Q000150:complications* / Q000175:diagnosis; D002343:Carotid Artery, Internal / Q000601:surgery; D016893:Carotid Stenosis / Q000150:complications* / Q000601:surgery; D016894:Endarterectomy, Carotid; D006801:Humans; D008297:Male; D008875:Middle Aged