Adult Appendicitis Score (AAS)
Adult Appendicitis Score (Sammalkorpi 2014): RLQ pain, pain relocation, RLQ tenderness, sex, age, guarding, and WBC/PMN/CRP bands (CRP by symptom duration) give a score (low 0–10, intermediate 11–15, high ≥ 16).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Right-lower-quadrant pain
- Yes
- Pain relocation to RLQ
- Yes
- RLQ tenderness
- Yes
- Female sex
- No
- Age
- 55 years
- Guarding
- Moderate or severe (4)
- WBC
- 15 ×10⁹/L
- Neutrophil percentage
- 84 %
- CRP
- 100 mg/L
- Symptom duration > 24 h
- No
Result: Adult Appendicitis Score 19 — high probability of appendicitis (>= 16).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-10
- Low probability of appendicitis.
- 11-15
- Intermediate.
- >= 16
- High probability. RLQ pain/relocation/tenderness, guarding, WBC/PMN/CRP (CRP by symptom duration). A risk score, not a surgery order.
What you enter
- Right-lower-quadrant pain
- Pain relocation to RLQ
- RLQ tenderness
- Female sex
- Age
- Guarding
- WBC
- Neutrophil percentage
- CRP
- Symptom duration > 24 h
How this is calculated
Sammalkorpi HE, Mentula P, Leppaniemi A. A new adult appendicitis score improves diagnostic accuracy of acute appendicitis - a prospective study. BMC Gastroenterol. 2014;14:114. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.