Retrocecal Appendicitis in Children: Similar Clinical Presentations Despite Diagnostic Challenges

Area of Science:

• Pediatric surgery
• Diagnostic imaging
• Gastrointestinal health

Background:

• The appendix's anatomical position can affect appendicitis presentation and diagnosis in children.
• The impact of retrocecal appendicitis on diagnostic accuracy and clinical outcomes is not well-established.

Purpose of the Study:

• To determine the prevalence of retrocecal appendicitis in pediatric patients.
• To assess if appendix positioning influences ultrasound diagnostic performance.
• To evaluate the effect of appendix positioning on clinical outcomes in pediatric appendicitis.

Main Methods:

• Retrospective cohort study of children (0-18 years) presenting with appendicitis at Mayo Clinic Rochester (2018-2023).
• Appendix location determined by imaging or surgical records.
• Collected data included demographics, symptoms, signs, and complication rates for retrocecal appendicitis (RCA) and non-retrocecal appendicitis (NRCA).

Main Results:

• 12.5% of 407 pediatric appendicitis cases were retrocecal.
• Ultrasound was less sensitive for RCA (53% equivocal/false negative) compared to NRCA (30%).
• Computed tomography (CT) showed similar diagnostic accuracy for both RCA and NRCA, with no significant difference in perforation, abscess, or hospitalization length.

Conclusions:

• Retrocecal appendicitis is a frequent variant in children with similar clinical features and outcomes to NRCA.
• The retrocecal position decreases ultrasound sensitivity, often necessitating CT scans.
• Despite diagnostic challenges, retrocecal appendicitis does not lead to a worse clinical course.