1 Department of Radiology, Rainbow Babies and Children's Hospital of the University Hospitals of Cleveland and Case Western Reserve University School of Medicine, 11100 Euclid Ave., Cleveland, OH 44106-5056, USA.
Helical CT in children shows an overlapping and wide spectrum of appearances of the normal and acutely inflamed appendix. The normal appendix may measure up to 10 mm in maximal diameter but should not have other CT signs of acute inflammation.