Appendicitis: Symptoms, Diagnosis, and Emergency Treatment Guide

Understanding Appendicitis

Appendicitis is inflammation of the appendix, a finger-shaped pouch projecting from your colon on the lower right side of your abdomen. The appendix's function remains unclear, though it may play a role in gut immune function. Appendicitis occurs when the appendix becomes blocked, usually by fecalith (hardened stool), lymphoid hyperplasia, or less commonly, tumors or foreign bodies.

Appendicitis is the most common abdominal surgical emergency, affecting approximately 7% of people in their lifetime, with peak incidence between ages 10-30. Despite advances in imaging and antibiotic therapy, timely diagnosis remains crucial—ruptured appendix carries significant morbidity including abscess formation, sepsis, and rarely death.

Recognizing Appendicitis Symptoms

Classic Presentation (Occurs in ~50% of cases)

Pain Migration (The "classic" sign):

1. Periumbilical (around navel) vague discomfort
2. Anorexia (loss of appetite) - nearly universal
3. Nausea and vomiting (typically AFTER pain starts)
4. Pain migrates to right lower quadrant (McBurney's point) over 6-12 hours
5. Pain localizes, worsens with movement, coughing, jarring

Common Symptoms

• Low-grade fever (99-101°F)
• Constipation or diarrhea
• Inability to pass gas
• Abdominal swelling
• Rebound tenderness (pain when pressure released)

Diagnostic Approach

Clinical Signs

McBurney's Point Tenderness:

• Location: 1/3 distance from hip bone to navel on right side
• Most reliable physical exam finding
• Tenderness at this point is highly suggestive

Rovsing's Sign:

• Palpation of left lower quadrant causes pain in right lower quadrant
• Suggests peritoneal irritation

Psoas Sign:

• Pain on extension of right thigh
• Suggests retrocecal appendix (behind cecum)

Obturator Sign:

• Pain on internal rotation of flexed right thigh
• Suggests pelvic appendix

Imaging Studies

Ultrasound (First-line in children, pregnant women):

• Advantages: No radiation, readily available
• Disadvantages: Operator-dependent, limited in obese patients or with bowel gas
• Findings: Dilated appendix (＞6 mm), hyperemic wall, appendicolith

CT Scan (Gold standard for adults):

• Advantages: High sensitivity (94%) and specificity (95%), visualizes entire abdomen
• Disadvantages: Radiation exposure, contrast allergy risk
• Findings: Dilated appendix (＞6 mm), wall thickening, fat stranding, appendicolith

MRI (Pregnant women when ultrasound inconclusive):

• Advantages: No radiation, excellent soft tissue contrast
• Disadvantages: Expensive, less available, longer acquisition time

Diagnostic Scores (Alvarado Score): | Finding | Points | |---------|--------| | Migratory pain | 1 | | Anorexia | 1 | | Nausea/vomiting | 1 | | RLQ tenderness | 2 | | Rebound tenderness | 1 | | Fever | 1 | | Leukocytosis | 2 | | Shift to left | 1 | Score ≥7: High probability of appendicitis (proceed to imaging/surgery) Score 5-6: Indeterminate (imaging required) Score <5: Low probability (consider other diagnoses)

Treatment Options

Surgery (Appendectomy) - Standard Treatment

Laparoscopic Appendectomy (Preferred):

• 3-4 small incisions
• Camera and instruments inserted
• Benefits: Less pain, faster recovery (1-2 weeks), lower wound infection rate
• Success rate: ＞95%
• Hospital stay: Usually same-day discharge or 1 overnight

Open Appendectomy:

• Single larger incision (3-4 inches) in right lower quadrant
• Indications: Failed laparoscopy, extensive perforation, prior surgeries, pregnancy (third trimester)
• Hospital stay: 2-3 days
• Recovery: 2-4 weeks

Antibiotic-First Approach (Controversial)

Evidence: Recent RCTs show antibiotics alone can treat uncomplicated appendicitis successfully in ~70% of cases at 1 year. However:

• 30% recur within 1 year (often require surgery)
• Longer time to recovery (median 7 days vs 3 days for surgery)
• Missed cancer risk (rare but possible)
• Patient satisfaction lower (fear of recurrence)

Current Guidelines: Antibiotic-first may be considered for:

• Uncomplicated appendicitis (no perforation, no abscess)
• Patients who want to avoid surgery
• Patients with high surgical risk
• Requires close follow-up and possible delayed surgery

Antibiotic Treatment

Preoperative (before surgery):

• Cefoxitin or Cefotetan (single dose) OR
• Ertapenem (single dose)
• Reduces surgical site infections

Postoperative (after surgery):

• Uncomplicated appendicitis: No continued antibiotics needed
• Complicated appendicitis (perforation): 3-5 days of antibiotics
• Abscess present: May require percutaneous drain + 7-10 days antibiotics

Recovery Timeline

Laparoscopic Appendectomy:

• Day 0: Surgery, discharged same day or next morning
• Day 1-3: Pain medication, light activity
• Week 1: Return to sedentary work if feeling well
• Week 2: Most normal activities, no heavy lifting
• Week 4: Full recovery, return to exercise

Open Appendectomy:

• Day 0-2: Hospital stay
• Week 1-2: Limited activity, incision care
• Week 3-4: Gradual return to normal
• Week 6+: Full recovery

After Rupture:

• Hospital stay: 3-7 days (antibiotics, possible drain)
• Recovery: 2-3x longer than uncomplicated
• Possible abscess formation requiring drainage

Prevention

No proven prevention strategies, but:

• High-fiber diet: Some evidence suggests reduced risk (mechanism unclear)
• Probiotics: Limited evidence, may reduce appendicitis-related complications
• Prompt treatment: When symptoms develop, seek care early to prevent rupture

Related Conditions

• Diverticulitis: Similar presentation, different location (left side)
• Ovarian Cyst: Right-sided pelvic pain in women
• Kidney Stones: Flank pain radiating to groin

FAQ

References