We hypothesized that PAS could be helpful in diagnosing young children with appendicitis and that we would find both parent delay and doctor delay contributing to the often late diagnosis in this age group. The aims of this study were to (1) evaluate Pediatric Appendicitis Score in children, operated on for suspected appendicitis, with respect to Pediatric Appendicitis Score sensitivity, specificity, positive predictive value, and negative predictive value; (2) investigate if there was a delay in diagnosing appendicitis; and (3) identify factors responsible for the possible late diagnosis in younger children In order to improve the diagnostic accuracy of acute appendicitis, ultrasound, computed tomography and post-appendectomy histopathological examination have been used as clinical aids in cutting down the rate of negative appendectomy without increasing morbidity and mortality.