A 22-year-old male presents to the emergency department with a 16-hour history of periumbilical pain that migrated to the right lower quadrant. On examination, he has a temperature of 38.2°C, localized tenderness at McBurney's point, and a positive Rovsing's sign. His white blood cell count is 14,200/μL with left shift. Ultrasound shows a non-compressible, dilated appendix with appendicolith. What is the most appropriate next step in management?

Explanation

## Clinical Diagnosis & Management Pathway **Key Point:** In acute appendicitis with clear clinical and imaging evidence, emergency appendicectomy is the gold standard and most appropriate next step. Delay increases morbidity and perforation risk. ### Why Emergency Surgery Is Indicated Here This patient has: - **Classic presentation:** periumbilical pain → RLQ localization (visceral → somatic pain pathway) - **Positive clinical signs:** McBurney's point tenderness, Rovsing's sign (stretching peritoneum) - **Inflammatory markers:** elevated WBC with left shift (immature neutrophils) - **Imaging confirmation:** ultrasound showing non-compressible dilated appendix (>6 mm) with appendicolith **High-Yield:** Appendicolith is a risk factor for perforation and complicates conservative management; it mandates surgical intervention in acute appendicitis. ### Management Algorithm ```mermaid flowchart TD A[Acute appendicitis suspected]:::outcome --> B{Clinical + imaging confirmation?}:::decision B -->|Yes, uncomplicated| C[Emergency appendicectomy]:::action B -->|Yes, with perforation/peritonitis| D[Resuscitation + emergency surgery]:::urgent B -->|Uncertain diagnosis| E[CT abdomen/pelvis]:::action C --> F[Open or laparoscopic approach]:::action E --> G{Appendicitis confirmed?}:::decision G -->|Yes| C G -->|No| H[Treat alternative diagnosis]:::action ``` **Clinical Pearl:** In uncomplicated acute appendicitis with diagnostic certainty, preoperative CT is unnecessary and delays definitive treatment. Imaging is reserved for diagnostic uncertainty or suspected complications (perforation, abscess). ### Why Observation/Conservative Management Is NOT Appropriate Here - Appendicolith significantly increases perforation risk - 16-hour duration with fever and elevated WBC indicates progression - Observation protocols (antibiotics alone) are reserved for **selected cases** with minimal symptoms, no peritoneal signs, and no imaging evidence of complicated disease - This patient has clear peritoneal irritation (Rovsing's sign positive) **Mnemonic: APPENDIX — Acute Presentation, Peritoneal signs, Periumbilical→RLQ, Elevated WBC, Nodule/appendicolith, Definitive surgery, Immediate action, X-ray/imaging confirms** [cite:Sabiston Textbook of Surgery Ch 50]