title: [Clinical application of magnetic resonance imaging in congenital anorectal malformation].
abstract: OBJECTIVE
  To investigate the clinical value of MRI examination in congenital anorectal malformation (CARM).
  
  
  METHODS
  Forty-four cases with operatively proved anorectal malformation from May 2008 to May 2012 in the authors' hospital were reviewed. Of the 44 cases, 25 were males and 19 females, their age ranged from 1 day to 2 years. MRI was performed in all patients.
  
  
  RESULTS
  Of all 44 cases, 15 cases had high imperforate anus (34%), rectum blind end were above PC line, the distance of rectum blind end and anus nest was (29.12 ± 2.35) mm; 8 cases had median imperforate anus (18%), rectum blind ends were near PC line, the distance of rectum blind end and anus nest was (18.98 ± 2.21) mm; 21 cases had low imperforate anus (48%), rectum blind ends were below PC line, the distance of rectum blind end and anus nest was (7.54 ± 1.08) mm. Twenty-five cases with fistula in 44 cases were confirmed by rectal angiography and surgery, accounting for 57%. In 13 cases with fistula, the lesion could be clearly demonstrated on MRI, in the remaining 12 cases with fistula, the lesion could not be visualized clearly or no image development occurred on MRI. Of all 44 cases, 1 case had tethered cord with filum terminale lipoma, 1 case had tethered cord, 2 cases had syringomyelia, 1 case had right kidney agenesis, 1 case had hydrocele. In 44 cases of multi-planar MRI imaging could clearly show the perianal muscles developmental situation, 36 cases had perianal muscles dysplasia, amd showed levator ani muscle, puborectalis and anal sphincter asymmetry, muscle belly slim.
  
  
  CONCLUSIONS
  MRI examination has a high clinical value in CARM diagnosis, can help accurately judge the anal atresia type, display the presence and running of most of the fistula, and diagnose perianal muscle development and other systems malformations, finally provide a reliable diagnostic basis for surgical program and prognostic assessment.
authors.affiliation: Department of Radiology, the Children's Hospital Affiliated to Soochow University, Suzhou 215003, China.
authors.forename: Fubin
authors.initials: F
authors.lastname: Yang
authors.affiliation: Email: shengmaosuzhou@163.com.
authors.forename: Mao
authors.initials: M
authors.lastname: Sheng
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Wanliang
authors.initials: W
authors.lastname: Guo
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiao
authors.initials: X
authors.lastname: Han
mesh_terms: D000015:Abnormalities, Multiple; D001003:Anal Canal / Q000002:abnormalities* / Q000601:surgery; D001006:Anus, Imperforate / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D002675:Child, Preschool; D005260:Female; D005402:Fistula / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D010502:Perineum / Q000473:pathology; D012007:Rectum / Q000002:abnormalities* / Q000601:surgery; D012189:Retrospective Studies; D014548:Urinary Fistula / Q000453:epidemiology / Q000209:etiology