title: Neuroendoscopic fenestration of the foramen of Monro without septostomy for unilateral hydrocephalus following neonatal intraventricular hemorrhage.
abstract: OBJECTIVE
  Unilateral hydrocephalus is a rare type of hydrocephalus caused by germinal matrix hemorrhage-intraventricular hemorrhage (GMH-IVH) in preterm infants. We present a case of posthemorrhagic unilateral hydrocephalus in a preterm infant that was successfully treated with neuroendoscopic fenestration of the foramen of Monro without septostomy.
  
  
  METHODS
  Brain ultrasound of a female infant born at 26(+1) weeks gestation revealed delayed unilateral hydrocephalus in the frontal horn of the lateral ventricle after IVH. In this case, unilateral hydrocephalus appeared to be caused by chronic inflammatory changes, leading to membrane formation in the foramen of Monro. After neuroendoscopic foraminoplasty without septostomy, ventricular size decreased, and the patient's neurological status improved per the PREMIE-NEURO exam, a neurologic examination for preterm infants of gestational age 23-37 weeks.
  
  
  CONCLUSIONS
  This case demonstrates that simple repermeation of the foramen without fenestration of the septum pellucidum can successfully treat membrane-induced unilateral hydrocephalus. Also, because hydrocephalus can develop even after stabilization of GMH-IVH, close follow-up during the first year of life and beyond may reduce the likelihood of brain damage due to advanced hydrocephalus.
authors.affiliation: Department of Neurosurgery, Hanyang University Medical Center, 17 Haengdang-dong, Sungdong-gu, Seoul 133-792, South Korea.
authors.forename: Hyoung-Joon
authors.initials: HJ
authors.lastname: Chun
authors.forename: Youngjoon
authors.initials: Y
authors.lastname: Lee
authors.forename: Hyun-Kyung
authors.initials: HK
authors.lastname: Park
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Kim
mesh_terms: D002543:Cerebral Hemorrhage / Q000150:complications / Q000601:surgery*; D002552:Cerebral Ventricles / Q000601:surgery*; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000601:surgery*; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D044583:Neuroendoscopy / Q000379:methods*; D016896:Treatment Outcome
references.citation: J Neurosurg. 1949 May;6(3):197-206
references.pmid: 18128019
references.citation: Childs Nerv Syst. 1999 Jan;15(1):56-68
references.pmid: 10066021
references.citation: Childs Nerv Syst. 1994 Jul;10(5):321-7
references.pmid: 7954501
references.citation: Arch Dis Child. 1982 Feb;57(2):158-60
references.pmid: 7065715
references.citation: J Neurosurg. 1949 Mar;6(2):153-9
references.pmid: 18114372
references.citation: Pediatr Neurosurg. 1993 Sep-Oct;19(5):233-41; discussion 242
references.pmid: 8398847
references.citation: Pediatr Neurosurg. 1996 Nov;25(5):248-51
references.pmid: 9309788
references.citation: Pediatr Radiol. 1989;19(5):328-9
references.pmid: 2666938
references.citation: J Neurosurg. 1964 Mar;21:226-9
references.pmid: 14127626
references.citation: Surg Neurol. 1993 Feb;39(2):110-4
references.pmid: 8351622
references.citation: Dev Med Child Neurol. 1990 Aug;32(8):725-9
references.pmid: 2210087
references.citation: Pediatr Neurosurg. 1991-1992;17(1):2-9
references.pmid: 1811706
references.citation: Acta Paediatr. 2000 Jan;89(1):77-81
references.pmid: 10677063
references.citation: Neurochirurgia (Stuttg). 1974 Mar;17(2):63-6
references.pmid: 4838724
references.citation: Pediatr Neurosurg. 2003 Jun;38(6):286-94
references.pmid: 12759507
references.citation: Neurosurgery. 1985 Dec;17(6):891-6
references.pmid: 4080120
references.citation: Neurosurgery. 1985 Jan;16(1):103-6
references.pmid: 3919328
references.citation: J Neurosurg. 2005 Jan;102(1 Suppl):113-8
references.pmid: 16206745
references.citation: Radiology. 1969 Apr;92(5):1061-4
references.pmid: 5305640
references.citation: Childs Nerv Syst. 1989 Dec;5(6):367-70
references.pmid: 2611771
references.citation: J Neurosurg. 1983 Nov;59(5):899-901
references.pmid: 6604795
references.citation: J Neurosurg. 1985 Mar;62(3):357-62
references.pmid: 3973704
references.citation: Pediatrics. 1989 Nov;84(5):797-801
references.pmid: 2677959
references.citation: J Neurosurg. 1970 Feb;32(2):219-26
references.pmid: 4904413
references.citation: Surg Neurol. 1991 Jan;35(1):14-9
references.pmid: 1983877
references.citation: Pediatr Neurosurg. 1995;23(1):14-9
references.pmid: 7495661
references.citation: J Neurosurg Sci. 2002 Jun;46(2):100-2; discussion 103
references.pmid: 12232559
references.citation: Neurochirurgie. 2008 Apr;54(2):72-8
references.pmid: 18374371
references.citation: Childs Nerv Syst. 2008 Aug;24(8):933-42
references.pmid: 18408934
references.citation: Arch Dis Child. 1981 Dec;56(12):900-4
references.pmid: 7332336