title: Headache and visual symptoms in two patients with MRI alterations in posterior cerebral artery territory.
abstract: Posterior cerebral artery (PCA) territory infarcts account for only 5-10% of all infarcts in stroke registries. Moreover, the clinical features and etiology of such infarcts have not been studied as extensively as those in other vascular territories.We describe two patients with recurrent episodes of visual symptoms and headache due to probable transitory PCA vasospasm. MR angiography in the acute phase revealed incomplete visualization of PCA, conventional MRI showed mild T2 signal alterations and MR perfusion showed the presence of marked hypoperfusion in the same regions. Diffusion weighted MR images were normal. All these findings resolved after therapy. These cases suggest that reversible signal alterations associated with reversible vessel and perfusion abnormalities may be observed in patients with visual symptoms and headache. Normal DWI-MR may help distinguish these patients from those affected by non-reversible ischemic attacks.
authors.affiliation: Stroke Unit, S. Andrea Hospital; II Faculty of Medicine, University of Rome Sapienza, Via di Grottarossa 1035, Rome, Italy. beccia.mario@gmail.com
authors.forename: M
authors.initials: M
authors.lastname: Beccia
authors.forename: V
authors.initials: V
authors.lastname: Ceschin
authors.forename: A
authors.initials: A
authors.lastname: Bozzao
authors.forename: A
authors.initials: A
authors.lastname: Romano
authors.forename: F
authors.initials: F
authors.lastname: Biraschi
authors.forename: L M
authors.initials: LM
authors.lastname: Fantozzi
authors.forename: M
authors.initials: M
authors.lastname: Rasura
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use; D000077144:Clopidogrel; D003937:Diagnosis, Differential; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006261:Headache / Q000209:etiology*; D006423:Hemianopsia / Q000209:etiology; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D020762:Infarction, Posterior Cerebral Artery / Q000150:complications / Q000188:drug therapy / Q000473:pathology*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D008881:Migraine Disorders / Q000175:diagnosis; D009553:Nimodipine / Q000627:therapeutic use; D012008:Recurrence; D013988:Ticlopidine / Q000031:analogs & derivatives / Q000627:therapeutic use; D014665:Vasodilator Agents / Q000627:therapeutic use; D020301:Vasospasm, Intracranial / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology*; D014786:Vision Disorders / Q000209:etiology*
chemical_list: D000925:Anticoagulants; D014665:Vasodilator Agents; D009553:Nimodipine; D006493:Heparin; D000077144:Clopidogrel; D013988:Ticlopidine