Prior antibiotic treatment for appendicitis

presence of medical condition prohibiting surgical therapy

radiographic or clinical evidence of abscess or perforation

appendiceal mass, positive pregnancy test

other diagnosis equally as likely as appendicitis

pain for ≥ 48 hours, white blood cell count ≥ 18,000, temperature ≥ 103º F, or appendiceal diameter ≥ 11 mm

inability to take oral antibiotics.

Comparison of Medical and Surgical Treatment of Uncomplicated Acute Appendicitis in Children