Clinical Scorecard: Acute Appendicitis Following Colonoscopy: An Uncommon Complication

At a Glance

Key Highlights

• The report describes a 75-year-old man whose acute appendicitis began the day after screening colonoscopy with cecal polypectomy.

• CT showed appendiceal dilation and adjacent edema without perforation; appendectomy histopathology confirmed acute inflammation.

• Approximately 70 cases had been reported in the English-language literature, and symptom onset usually occurs within several days of colonoscopy.

• A proposed case definition is symptom onset within 72 hours of colonoscopy with no visible inflammation around the appendiceal region during endoscopy.

• Potential mechanisms are proposed, but the relationship between colonoscopy and appendicitis has been questioned.

Guideline-Based Recommendations

Diagnosis

• The article states that postcolonoscopy appendicitis has a clinical presentation and disease course that do not appear appreciably different from spontaneous appendicitis.

• In the reported case, CT showed appendiceal dilation with adjacent edema without perforation; histopathology confirmed acute inflammation.

Management

• In the reported case, laparoscopic appendectomy was performed, and postoperative recovery was uncomplicated.

Monitoring & Follow-up

• The article reports that symptoms usually begin within several days after colonoscopy; cases arising weeks later seem more likely to be unrelated.

Risks

• The article describes appendicitis as an uncommon complication and notes that causation has been questioned.

• Proposed mechanisms include insufflation-related pressure or barotrauma, movement of fecal material into the appendix, and obstruction of the appendiceal orifice.

Patient & Prescribing Data

The case involved a 75-year-old man with obesity, hypertension, type 2 diabetes, obstructive sleep apnea, coronary artery disease, paroxysmal atrial fibrillation, and prior aortic valve replacement.

The patient underwent laparoscopic appendectomy after CT showed appendiceal dilation and adjacent edema; pathology confirmed acute inflammation without perforation.

Clinical Best Practices

• The article reports that postcolonoscopy appendicitis presents and progresses similarly to spontaneous appendicitis.

• The article states that cases arising weeks after colonoscopy seem more likely to be unrelated to the procedure.

• The article considers inflammation visible around the appendiceal region during colonoscopy likely to have preceded the examination.

Related Resources & Content

1. Tepelenis et al., Post-colonoscopy appendicitis: A systematic review, 2024

2. Frontiers in Surgery — Subserosal Embedding of the Appendix-Cecal Complex Resulting in Non-Visualization of the Appendix in Pediatric Laparoscopic Appendectomy: A Case Study

3. Cholangioscope-Enhanced ERAT for Diagnosing and Managing Ulcerative Colitis with Inflammation of the Appendiceal Orifice: A Case Study and Review of Existing Literature

4. Surgical Endoscopy — Comparison of Prophylactic Abdominal Drainage and Non-Drainage Following Laparoscopic Appendectomy for Perforated Acute Appendicitis: A Multicenter Propensity Score-Weighted Study

5. ASCO Publications — Risk of relapse after surgical resection of localized appendiceal adenocarcinoma.

6. Bowel Preparation in Quality Guidelines and Clinical Practice

7. Beyond the Scope: Unmasking Appendicitis Following Colonoscopy

8. Diagnosis and Treatment of Acute Appendicitis: 2025 Edition of the World Society of Emergency Surgery Jerusalem Guidelines

9. Bowel Preparation in Quality Guidelines and Clinical Practice - PMC

10. Beyond the Scope: Unmasking Appendicitis Following Colonoscopy

11. Diagnosis and Treatment of Acute Appendicitis: 2025 Edition of the World Society of Emergency Surgery Jerusalem Guidelines - PubMed

12. Global practices and attitudes in acute appendicitis management: the PAMAP-W international survey and Delphi consensus study on the WSES appendicitis grading system | World Journal of Emergency Surgery | Springer Nature Link

13. Post-colonoscopy appendicitis: A systematic review - ScienceDirect