Comparison of clinical judgement and Alvarado score in the diagnosis of acute appendicitis

INTERVENTION: We are planning to recruit 125 patients into each group, until we recruit approximately 250 participants. In each group we take the patient's history, physical examination, body temperature (rectal‐axillar), white blood cell level, US examination. We calculate the Alvarado point of recovery patient. In group A the further therapy depends on this point (1‐4 emission, 5‐6 observation, 7‐10 laparoscopic or open appendectomy). In group B the leading surgeon decides the therapy of the patient without reference of the Alvarado point. After appendectomy we check the pathological finding, call back the patient one week after the operation, and one year after it to a control examination. In case of emission without operation, we make a control one year after the appearance in our emergency room, to find out if the symptoms or complaints are still occurring. CONDITION: Acute appendicitis ; Digestive System ; Acute appendicitis PRIMARY OUTCOME: Specificity, sensitivity and positive predictive value of Alvarado score vs clinical judgement. SECONDARY OUTCOME: Measure the specificity and sensitivty of US examination practice in our department INCLUSION CRITERIA: 1. Patients aged 18 or older, who present in our Surgical Department with right quadrant abdominal pain are included in our study 2. Every participiant should be able to read through an information sheet and sign a consent form