Longitudinal Evaluation of Gray Matter Atrophy in Mild Cognitive Impairment: A Voxel-Based Morphometric Study

Abstract

Purpose: Our purpose was to investigate the frequency of the redundant sigmoid colon on computed tomography (CT) images by using Kantor's criteria and to compare the results with literature. We also aimed to emphasize the clinical importance of redundancy and to increase the awareness of radiologists for this condition. Material and Methods: This retrospective study was performed with 500 patients who underwent CT scan from August to October 2017. Axial views were evaluated to detect the presence of the redundant sigmoid colon. The thickness of rectus abdominis muscle, psoas muscle, subcutaneous fat, anteroposterior diameter of abdomen and thetransverse diameter between each anterior superior iliac spinae were measured. The presence of colonic diverticulae was also noted. Results: The redundant sigmoid colon was detected in 93 patients with a frequency of 18,6%. Age and sex were not significantly different between both groups. The transverse diameter between each anterior superior iliac spinae was significantly shorter in patients with redundant sigmoid colon. Conclusion: Kantor's criteria is a useful method for evaluation of the redundancy of the sigmoid colon on axial CT images. The frequency of the redundant sigmoid colon is nearly 20% and this condition is important since it is a major risc factor for volvulus, it causes incomplete optic colonoscopies and is associated with irritable bowel syndrome.