Published online Dec 28, 2014. doi: 10.4329/wjr.v6.i12.913
Revised: October 24, 2014
Accepted: October 31, 2014
Published online: December 28, 2014
Processing time: 210 Days and 7.6 Hours
AIM: To assess the frequency of visualization, position and diameter of normal appendix on 128-slice multidetector computed tomography (MDCT) in adult population.
METHODS: Retrospective cross sectional study conducted at Radiology Department, Dallah Hospital, Riyadh, Saudi Arabia from March 2013 to October 2013. Non-enhanced computed tomography scans of abdomen and pelvis of 98 patients presenting with hematuria (not associated with abdominal pain, fever or colonic disease) were reviewed by two radiologists, blinded to patient history. The study group included 55 females and 43 males with overall mean age of 54.7 years (range 21 to 94 years). The coronal reformatted images were reviewed in addition to the axial images. The frequency of visualization of appendix was recorded with assessment of position, diameter and luminal contents.
RESULTS: The appendix was recorded as definitely visualized in 99% of patients and mean outer-to-outer diameter of the appendix was 5.6 ± 1.3 mm (range 3.0-11.0 mm).
CONCLUSION: MDCT with its multiplanar reformation display is extremely useful for visualization of normal appendix. The normal appendix is very variable in its position and diameter. In the absence of other signs, the diagnosis of acute appendix should not be made solely on outer-to-outer appendiceal diameter.
Core tip: With recent advances in computed tomographic technology, there is improvement in quality of imaging with better spatial and contrast resolution, which has resulted in improved diagnosis and management of patients specially with acute appendicitis. In our institute 128-slice multidetector computed tomography installed last year, which improved our confidence of visualization of appendix. We reviewed our set of patients and looked specifically at outer-to-outer diameter of normal appendix which varied between 3 mm to 11 mm, these findings further emphasized that there is substantial variability in cutoff of normal appendiceal diameter which was up to 11 mm in our series. This further potentiated the fact that acute appendicitis can not be established solely on the base of diameter.