A 28-year-old woman presents with a 36-hour history of right lower quadrant pain, initially periumbilical. She has mild fever (37.8°C), mild leukocytosis (11,200/mm³), and focal tenderness at McBurney's point without significant rebound or guarding. Ultrasound shows a dilated appendix (7 mm) with mild periappendiceal echogenicity but no free fluid. She is hemodynamically stable and tolerating oral intake. What is the most appropriate management strategy?

Explanation

## Clinical Context: Uncomplicated Appendicitis in a Stable Patient **Key Point:** This patient has uncomplicated acute appendicitis with mild systemic signs and no peritoneal signs (no rebound or guarding). Conservative management with antibiotics followed by interval appendectomy is a safe, evidence-based alternative to emergency surgery in selected, hemodynamically stable patients. ## Criteria for Conservative (Non-Operative) Management | Criterion | This Patient | Status | |-----------|--------------|--------| | Hemodynamic stability | Yes | ✓ | | No signs of perforation/peritonitis | Yes (mild tenderness only) | ✓ | | No free fluid on imaging | Yes | ✓ | | Mild systemic inflammation | Yes (WBC 11,200, low-grade fever) | ✓ | | Reliable follow-up | Assumed | ✓ | ## Management Algorithm **High-Yield:** The APPAC trial (2015) and subsequent meta-analyses have shown that uncomplicated appendicitis can be managed non-operatively in 60–70% of cases with success rates >90% using broad-spectrum antibiotics. 1. **Immediate phase:** IV broad-spectrum antibiotics (e.g., ceftriaxone + metronidazole or piperacillin-tazobactam) 2. **Reassessment:** Clinical evaluation at 24 hours 3. **If improved:** Continue antibiotics; discharge home on oral antibiotics 4. **If worsening:** Proceed to emergency appendectomy 5. **Definitive treatment:** Interval appendectomy (elective) at 6–8 weeks ## Why Interval Appendectomy? **Clinical Pearl:** Interval appendectomy (planned surgery after inflammation has resolved) reduces operative morbidity compared to emergency surgery in the acute phase. It is performed 6–8 weeks after successful antibiotic treatment to allow inflammation to subside and reduce adhesions. **Mnemonic:** **SAFE** — Stable, Antibiotics, Follow-up, Elective interval surgery ## Contraindications to Conservative Management - Hemodynamic instability - Signs of perforation or peritonitis (rebound, guarding, rigid abdomen) - Free fluid/abscess on imaging - Immunocompromised state - Inability to follow up