PAS total = migration of pain + anorexia + nausea/vomiting + fever + RLQ tenderness + RLQ cough/percussion/hopping tenderness + leukocytosis + neutrophilia. Total range is 0 to 10 points.

Component	Definition	Points
Migration of pain	Pain migrating to the right lower quadrant	1
Anorexia	Reported loss of appetite	1
Nausea or vomiting	History of nausea and/or vomiting	1
Fever	Temperature ≥38.0°C	1
RLQ tenderness	Localised tenderness over the right iliac fossa/RLQ	2
RLQ cough/percussion/hopping tenderness	Pain in the RLQ with coughing, percussion or hopping	2
Leukocytosis	WBC above 10 x 10^9/L	1
Neutrophilia	ANC above 7.5 x 10^9/L	1

PAS total	Risk group
0–3	Low risk
4–6	Equivocal/intermediate risk
≥7	High risk

Pediatric Appendicitis Score (PAS)