B. C., BomK. C., AchhitaSubedi, Raj Kumar Subedi2025-12-262025-12-262025https://hdl.handle.net/20.500.14572/3848Bom B. C. Department of Radiology, Rapti Academy of Health Sciences, Ghorahi, Dang, Nepal Achhita K. C. Department of Pathology, Rapti Academy of Health Sciences, Ghorahi, Dang, Nepal Raj Kumar Subedi Bhaskar Tejshree Memorial Foundation, NepalAbstract: Introduction: The appendix is a blind-ended tubular gut structure which arises from caecum with considerable variation in position and morphology. Acute appendicitis remains one of the most common causes of acute abdomen that requires emergency radiological investigation. The objective of this study was to evaluate normal appendix by computed tomography (CT) of abdomen in patients with non-appendicular symptoms. Methods: This was a retrospective cross-sectional study based on record review of patients undergoing CT abdomen attending Rapti Academy of Health Sciences (RAHS) without suspicion of acute appendicitis from October 2024 to March 2025. Axial including reformatted coronal and sagittal images were evaluated for appendix visualization, its diameter, wall thickness, intra-luminal contents and tip position. Data collection was done after receiving ethical approval from the Institutional Review Committee of RAHS. Data analysis was performed using Statistical Package for the Social Sciences version 27. Results: Among 216 patients (109 males, 107 females; mean age of 46.8 years), appendix visualization rate was 96.8% (98.1% in female and 95.4% in male). The mean appendix diameter was 6.13±1.03 mm (range: 3.6-10.0 mm) with no significant sex difference. Mean wall thickness was 2.55 ± 0.53 mm. Air was the predominant intra-luminal content (50.7%), followed by collapsed lumen (35.9%). The most common appendix tip position was retro-caecal (49.3%), followed by pelvic (22.0%). Conclusion: There was higher appendix visualization rate in our study using CT. As normal appendix can measure >6 mm in CT, ultrasound size criteria for appendicitis is not applicable in CT.en-UScomputed tomographydiameternormal appendixpositionwall thicknessArticle