title: [Significance of spina bifida occulta in non-retentive fecal incontinence in children].
abstract: OBJECTIVE
  To explore the pathophysiological significance of spina bifida occulta (SBO) in non-retentive fecal incontinence (NRFI) in children.
  
  
  METHODS
  Twenty-seven children with NRFI diagnosed according to the Rome III criteria, 21 with SBO, aged (7.9 +/- 2.4) years, and 6 without SBO, aged (7.5 +/- 1.9) years, and 226 normal controls, aged (8.4 +/- 2.7) years, underwent plain X-ray photography, neurophysiological study, colonic transit test, electromyography (EMG), and anorectal manometry. The resting vector volume, squeezing vector volume, resting EMG amplitude, and squeezing EMG amplitude, which predominantly reflect internal and external anal sphincter function, were recorded.
  
  
  RESULTS
  The prevalence rate of SBO in the children with NRFI was 78%, significantly higher than that of the normal controls (24%). The resting vector volume, squeezing vector volume, resting EMG amplitude, and squeezing EMG amplitude, of the children with NRFI were all significantly lower than those of the normal controls; however, there were no significant differences in these indexes between the NRFI children with and without SBO. The total colonic transit time of the NRFI children with SBO was (41 +/- 17) h, significantly longer than those of the children without SBO and normal controls (24 +/- 5) h and (29 +/- 8) h, both P < 0.05]. Neurophysiologic test showed that the latency of pudendi-anal reflex of the NRFI children with SBO was (52 +/- 20) ms, significant longer than those of the NRFI children without SBO and normal controls [(29 +/- 9) ms and (23 +/- 7) ms respectively, both P < 0.05].
  
  
  CONCLUSIONS
  SBO is a major cause of NRFI. Treatment should be focused on recovery of the functions of nervous system.
authors.affiliation: Department of Pediatric Surgery, Affiliated Shengjing Hospital, China Medical University, Shenyang 110004, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.forename: Zheng-Wei
authors.initials: ZW
authors.lastname: Yuan
authors.forename: Wei-Lin
authors.initials: WL
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Shu-Cheng
authors.initials: SC
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D001003:Anal Canal / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005242:Fecal Incontinence / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008161:Lumbosacral Region; D015995:Prevalence; D016136:Spina Bifida Occulta / Q000150:complications*