The CHildren’s INterval Appendicectomy (CHINA) Study

INTERVENTION: 1. Interval appendicectomy 2. Planned interval appendicectomy 6‐8 weeks following successful non‐operative treatment of appendix mass 3. Watchful waiting 4. Regular (3 monthly) observation for a 1 year period 5. Follow Up Length: 12 month(s) 6. Single randomisation only CONDITION: Appendicitis in paediatrics ; Infections and Infestations ; Acute appendicitis PRIMARY OUTCOME: Recurrence of acute appendicitis within 12 months of recruitment SECONDARY OUTCOME: 1. Cost analysis; 2. Histology of resected appendix; 3. Significant complications during or following interval appendicectomy within 12 months INCLUSION CRITERIA: 1. Diagnosis of acute appendicitis with appendix mass 2. Appendix mass palpable clinically, during examination under anaesthetic or identified radiologically (ultrasound or CT scan) 3. Have been successfully treated nonoperatively during the acute stage of the illness 4. Aged >3yrs and <16 yrs 5. Male or female