Yes, Rovsing's Sign Can Be Negative While McBurney's Sign Is Positive
This is a common clinical scenario in acute appendicitis, as physical examination signs have variable sensitivity and can be independently positive or negative—a negative Rovsing's sign does not exclude appendicitis when McBurney's sign is positive.
Understanding the Clinical Reality
Physical examination signs in acute appendicitis are imperfect diagnostic tools that operate independently. The evidence demonstrates that:
- A positive test increases the likelihood of appendicitis, but a negative test does not exclude the diagnosis 1
- These signs should be used as supplementary tools rather than definitive diagnostic criteria 1
- In children specifically, absent/decreased bowel sounds, psoas sign, obturator sign, Rovsing sign, and right lower quadrant rebound tenderness are all suggestive findings 2, but none are universally present
Why This Discordance Occurs
The pathophysiology explains why signs can be discordant:
- McBurney's sign (tenderness at McBurney's point) reflects direct peritoneal irritation at the anatomic location of the appendix
- Rovsing's sign (right lower quadrant pain with left lower quadrant palpation) depends on the transmission of pressure through the colon and peritoneal cavity, which requires more extensive peritoneal inflammation
A patient can have localized inflammation sufficient to produce McBurney's tenderness without the diffuse peritoneal irritation needed for a positive Rovsing's sign.
Clinical Implications
When you encounter this scenario:
- Do not dismiss appendicitis based on a negative Rovsing's sign alone
- Integrate multiple clinical findings: right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the most reliable signs in adults 3
- In children, look for the constellation of findings including decreased bowel sounds and other peritoneal signs 2, 3
- Use validated scoring systems (Alvarado, Pediatric Appendicitis Score, AIR score) to stratify risk rather than relying on individual signs 4, 2, 3
Common Pitfalls to Avoid
- Do not require all physical signs to be positive before considering appendicitis—the sensitivity of individual signs is limited 1
- Remember that even conditions mimicking appendicitis (like primary segmental omental torsion) can present with positive McBurney's sign without classic appendicitis findings 5
- Physical examination findings should prompt appropriate imaging (ultrasonography first-line) rather than serve as sole diagnostic criteria 4, 2
Practical Approach
When McBurney's sign is positive but Rovsing's sign is negative:
- Calculate a clinical risk score (Alvarado ≥7 suggests high probability) 6
- Obtain point-of-care or formal ultrasonography as first-line imaging 4, 3
- Check inflammatory markers (WBC, CRP) to support clinical assessment 4
- In moderate-to-high risk patients, pursue surgical consultation promptly regardless of individual sign discordance 3
The key message: physical examination signs in appendicitis are additive tools that increase diagnostic probability when positive, but their absence does not rule out disease 1. Clinical judgment incorporating multiple data points trumps any single physical finding.