RESUMO
Objective To investigate the magnetic resonance imaging(MRI) in the diagnosis of congenital anorectal malformation.Methods Fourteen patients with congenital anorectal malformation received pelvic and sacrococcygeal MRI scan with 5 normal controls.The morphological changes of puborectalis and anal sphincter,and the abnormalities of anus,rectum,sacral vertebra and genitourinary system were observed.Results The best developed puborectalis and anal sphincter were showed in 13 cases,the better developed in 3 cases,the least developed in 3 cases,respectively.There were 7 cases with abnormalities of sacral vertebra and 5 cases with abnormalities of genitourinary system.Conclusion MRI examination plays an important role in the diagnosis of congenital anorectal malformation.The morphological changes of puborectalis and anal sphincter,and the abnormalities of sacral vertebra and genitourinary system can be determined by the MRI examination, which is important in clinical therapy planning and accessing the curative effect.