title: [Neonatal cystic structure adjacent to frontal horn--MRI features].
abstract: OBJECTIVE
  To evaluate the incidence and features of cystic structures adjacent to the frontal horns of neonates using MRI, and to assess the clinical features of the neonates.
  
  
  METHODS
  Between April 2001 and January 2005, MRI examinations were performed at our hospital in 352 neonates and infants whose postconceptional age was less than 48 weeks. We retrospectively evaluated the MRI findings and the clinical records.
  
  
  RESULTS
  Seventeen babies (8 males and 9 females) showed cystic structures adjacent to frontal horns, hemilaterally or bilaterally. The incidence of the cysts was 4.8% in total, and was 1.4% (1/74), 9.2% (6/65), and 4.7% (10/213)in term infants, preterm infants born at 33-36 weeks of gestational age, and at less than 32 weeks, respectively. The cysts ranged from 1 to 8 mm in diameter, and were located in the white matter adjacent to ventricular walls and in the portion cephalad to the frontal horns. The cysts resolved in 5 cases (with follow-up ranging from 3 months to 2 years of age), causing slight dilatation of the frontal horn. Developmental disturbances were not observed in patients without other abnormalities.
  
  
  CONCLUSIONS
  Cystic structures near the frontal horns in neonates are detected by MRI at a rate of 4.8%. They will resolve spontaneously without causing developmental abnormalities.
authors.affiliation: Department of Medical Imaging, Sapporo City General Hospital.
authors.forename: Noriko
authors.initials: N
authors.lastname: Nakamura
authors.forename: Chihoko
authors.initials: C
authors.lastname: Miyazaki
authors.forename: Yu
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Maki
authors.initials: M
authors.lastname: Onodera
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Sugiura
authors.forename: Kouzo
authors.initials: K
authors.lastname: Kubo
authors.forename: Tateo
authors.initials: T
authors.lastname: Nakajima
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hattori
authors.forename: Satoshi
authors.initials: S
authors.lastname: Terae
mesh_terms: D001921:Brain / Q000473:pathology*; D001927:Brain Diseases / Q000175:diagnosis*; D002552:Cerebral Ventricles / Q000473:pathology*; D003560:Cysts / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D015997:Neonatal Screening / Q000379:methods*; D012189:Retrospective Studies