14781-koppen

206 Chapter 9 megarectum (diameter >6.5 cm), since this reference value was adopted from adult studies in a different viewing pane (lateral X-ray). However, there are no absolute cutoff values available for megacolon/megarectum in children. In our study, segmental colonic dilation was associated with colonic dysmotility in children with FC. Therefore, if segmental colonic dilation or elongation are identified in children with intractable FC, a comprehensive motility evaluation should be considered. In addition, the combination of manometry testing and contrast enema studies may help guide surgical management of children with FC by identifying dysmotile colonic segments.