title: Intracranial aneurysms in infants and children.
abstract: BACKGROUND
  The diagnosis and imaging of pediatric aneurysms has changed since the advent of MR and MRA.
  
  
  OBJECTIVE
  To update the literature on pediatric aneurysms and better define the appropriate work-up of childhood aneurysms in 1997.
  
  
  METHODS
  Retrospective review of 21 children (12 boys, 9 girls) with 25 aneurysms from three institutions over a 20-year period was performed. Imaging studies were mixed and included CT (19 patients), MR (11 patients), MRA (6 patients) and angiography (18 patients).
  
  
  RESULTS
  Eighteen of 25 aneurysms were congenital saccular, 6 were mycotic, and 1 was post-traumatic. Of these, 44 % were in the posterior circulation. Nine aneurysms arose from distal arterial branches. Forty percent were large (between 1-2.5 cm) and 16 % were giant (> 2.5 cm). CT and MR showed hemorrhage, and frequently revealed the aneurysms as a focal mass with or without enhancement and flow void. Six children had MRA which revealed aneurysms in four patients. All patients with MRA had corresponding conventional angiography.
  
  
  CONCLUSIONS
  Characteristics of pediatric aneurysms include diversity of type, increased incidence in the posterior fossa, peripheral location, and large size. CT, MR and MRA are useful in the diagnosis with conventional angiography essential for preoperative planning.
authors.affiliation: University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Allison
authors.forename: P C
authors.initials: PC
authors.lastname: Davis
authors.forename: Y
authors.initials: Y
authors.lastname: Sato
authors.forename: C A
authors.initials: CA
authors.lastname: James
authors.forename: S S
authors.initials: SS
authors.lastname: Haque
authors.forename: E J
authors.initials: EJ
authors.lastname: Angtuaco
authors.forename: C M
authors.initials: CM
authors.lastname: Glasier
mesh_terms: D000293:Adolescent; D000792:Angiography; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000473:pathology; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed