Abstract
Background The appendix exhibits varied anatomical orientations, which significantly influence
the diagnosis and treatment of appendicitis. Existing literature predominantly relies
on cadaveric studies to delineate common appendix positions, lacking comprehensive
computed tomography (CT)-based investigations on a large scale. Thus, our study endeavors
to delineate the prevailing position of the appendix on CT scans and ascertain its
concordance with existing literature, thereby augmenting our understanding of this
anatomical entity. This cross-sectional study was conducted in a tertiary care hospital
setting.
Materials and Methods A total of 1,068 patients aged 18 years and older, undergoing abdominal CT scans
at the hospital between July 2020 and July 2021, were enrolled in the study, with
exclusion criteria applied to conditions that could distort anatomical features. The
position of the appendix was meticulously documented for each patient, alongside measurements
including diameter, wall thickness, and origin. Data collection utilized a predefined
Microsoft Excel sheet. Subsequently, numerical and relative frequencies were computed
for appendiceal positions and origins. Additionally, diameter and wall thickness were
assessed, and pertinent parameters were derived.
Results The relative frequencies of various potential appendiceal positions observed in our
study were as follows: subcecal: 6.6%; paracecal: 1.2%; pelvic: 21.9%; postileal:
32.9%; preileal: 6.7%; retrocecal: 28.5%; subhepatic: 2.2%.
Conclusion In contrast to traditional assumptions, our findings reveal that the most prevalent
positions of the appendix are postileal, retrocecal, and pelvic, challenging historical
beliefs.
Keywords
appendix - positions - MDCT - in vivo
