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CT appearance of the normal appendix in adults.
Stefania Tamburrini1, Arturo Brunetti, Michèle Brown
1Dip. Sc. Biomorfologiche e Funzionali, Universita' di Napoli Federico II, IBB-CNR, Via Pansini 5, 80131, Naples, Italy. stamburrini@sirm.org
European Radiology
|May 25, 2005
Summary
This study defines the normal appendix range on computed tomography (CT) scans, finding significant overlap between normal and abnormal appearances. Diagnosis of appendicitis requires considering secondary signs beyond appendix visualization.
Area of Science:
- Radiology
- Medical Imaging
- Gastrointestinal Imaging
Background:
- Accurate interpretation of computed tomography (CT) scans is crucial for diagnosing abdominal conditions.
- The appendix's appearance on CT can vary, potentially leading to diagnostic challenges.
Purpose of the Study:
- To establish the normal range of appendix dimensions and characteristics on CT.
- To investigate correlations between patient demographics (age, sex) and appendix visibility/appearance.
- To identify normal variations in appendix wall thickness, content, and location.
Main Methods:
- Analysis of 372 abdominopelvic CT scans from outpatients.
- Review of appendiceal outer-to-outer wall diameter, wall thickness, location, and content.
- Correlation of these findings with patient age and sex.
Main Results:
- The appendix was visualized in 305 out of 372 patients.
- Appendix diameter ranged from 3-10 mm, with 42% exceeding 6 mm.
- Appendix location was highly variable; wall thickness averaged 0.15 cm in measurable cases.
Conclusions:
- There is considerable overlap between normal and abnormal CT findings of the appendix.
- Diagnosis of acute appendicitis should integrate secondary signs alongside appendix appearance.