A 5-year-old boy had periumbilical pain with the suspicion of appendicitis, whereas a 10-year-old girl had recurrent nonbilious omiting.

• 一例5岁大女孩脐周疼痛，怀疑为阑尾炎，而一例10岁大的女孩有复发的非胆汁性呕吐。