Computed Tomography による肛門括約筋群の画像化と,その有用性に関する研究

概要

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CT was applied to 5 normal children an 16 children with various types of anorectal malformations, in order to make direct image of anal sphincters. In normal and low type anomalies, CT demonstrated the clear images of puborectal muscle and external sphincters. Among high type anomalies, the distribution of sphincter muscles in rectovesical fistula is totally different from those in rectovesical fistula. In rectourethral fistula, puborectal muscle is attached not only around the urethra, but also around the blind rectum, and external sphincters are also present as a mass beneath the perineum. In the rectovesical fistula, however, puborectal muscle can not be identified and external sphincters exist only as a strand like structure. CT was also useful to assess postoperativly whether the colon was pulled through correctly within the center of sphincter muscles. CT has demonstrated clearly the differences among three types of postoperative incontinence, namely, sphincter dysfunction, missed puborectalis and markedly hypo plastic sphincters. CT has been proved to be an adequate imaging modality for the evaluation of anorectal malformations.
日本小児外科学会の論文
1986-08-20