Acute appendicitis is a frequent abdominal pathology, more frequent in the childhood. The pathophysiology of acute appendicitis is obstruction of the appendix lumen and distension due to continued mucosal secretion. The second step is a rapid multiplication of resident bacteria, excretion of toxine and wall infiammation. Causes of this processes are different: in most of cases there is an hyperplasia of intrinsic lymphoid tissue (60%) or hard stool. Another cause may be foreign body. But is there a relationship between abdominal trauma and appendicitis?