[Leukocyte count, C reactive protein, alpha-1 acid glycoprotein and erythrocyte sedimentation rate in acute appendicitis].

Background: The diagnosis of acute appendicitis is clinic, but in some cases, it can present unusual symptoms. The diagnostic difficulties still lead surgeons to unnecessary laparotomies, which reach rates from 15% to 40%. Laboratory exams, then, may become important to complement appendicitis diagnosis.