Score ≤ 2
Low risk (0-2.5%)
Consider discharge home with close follow up
Score 3-6
Indeterminate risk
Consider serial exams, consultation, or imaging
Score ≥ 7
High risk
Consider surgical consultation
Low risk (0-2.5%)
Consider discharge home with close follow up
Indeterminate risk
Consider serial exams, consultation, or imaging
High risk
Consider surgical consultation
pARC score shown to outperform Pediatric<unk> Score. pARC score accurately assesses risk of<unk> in children age 5 years and older in community EDs 
WBC
<10K is a negative predictor of<unk> Urinalysis
7-25% of patients with<unk> have sterile pyuria
<10K is a negative predictor of<unk> 7-25% of patients with<unk> have sterile pyuria
Consider in intermediate or higher risk patients
Ultrasound
Sn: 88%, Sp: 94%
Consider as 1st choice in non-obese children
Indeterminate ultrasound and an Alvarado <5 has an NPV of 99.6%
CT with contrast
Sn: 94%, Sp: 95%
Consider if ultrasound is equivocal OR strong suspicion despite normal ultrasound
Sn: 88%, Sp: 94%
Consider as 1st choice in non-obese children
Indeterminate ultrasound and an Alvarado <5 has an NPV of 99.6%
Sn: 94%, Sp: 95%
Consider if ultrasound is equivocal OR strong suspicion despite normal ultrasound
Appendicitis 
Emergent
Cervicitis
Necrotizing Enterocolitis
Uvulitis
Volvulus
Orchitis
Testicular torsion