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Related Concept Videos

Appendicitis-I: Introduction01:22

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The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
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Murine Appendectomy Model of Chronic Colitis Associated Colorectal Cancer by Precise Localization of Caecal Patch
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Creating diagnostic criteria for perforated appendicitis using cross-sectional imaging.

Joseph T Church1, Megan A Coughlin2, Alexis G Antunez3

  • 1Department of Surgery, University of Michigan Health System, 2110 Taubman Center, 1500 E. Medical Center Dr., Ann Arbor, MI, 48109, USA. jchurc@med.umich.edu.

Pediatric Surgery International
|July 5, 2017
PubMed
Summary

This study compared CT and MRI for diagnosing perforated appendicitis in children. MRI showed higher sensitivity, while CT, when combined with clinical factors, achieved greater specificity for diagnosing appendicitis.

Keywords:
CTCross-sectional imagingMRIPerforated appendicitis

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Area of Science:

  • Radiology
  • Pediatric Surgery
  • Emergency Medicine

Background:

  • Distinguishing perforated from acute appendicitis preoperatively presents diagnostic challenges.
  • Accurate preoperative diagnosis is crucial for appropriate surgical planning and patient management.

Purpose of the Study:

  • To compare the diagnostic performance of computed tomography (CT) and magnetic resonance imaging (MRI) in identifying perforated appendicitis in pediatric patients.
  • To develop and validate diagnostic criteria for perforated appendicitis using imaging findings and clinical correlates.

Main Methods:

  • Retrospective review of pediatric appendectomy cases within one day of CT or MRI.
  • Categorization of imaging findings into 'hard' (e.g., abscess, pneumoperitoneum) and 'soft' (e.g., diffuse inflammation, free fluid) features.
  • Logistic regression analysis to correlate clinical factors (WBC, temperature, peritoneal signs, symptom duration) with perforation.

Main Results:

  • MRI demonstrated higher sensitivity (86.7%) and specificity (74.3%) compared to CT (68.4% sensitivity, 92.4% specificity) for diagnosing perforated appendicitis using imaging findings alone.
  • Clinical factors including elevated white blood cell count (WBC > 15), fever (temperature > 38.0°C), and peritoneal signs were significant predictors of perforation.
  • Incorporating clinical correlates improved CT accuracy, yielding 68.4% sensitivity and 93.9% specificity.

Conclusions:

  • MRI showed a trend towards higher sensitivity, while CT exhibited greater specificity for complicated appendicitis.
  • A diagnostic algorithm combining CT imaging with specific clinical correlates significantly enhances the specificity of CT in diagnosing perforated appendicitis.