<prompt> This young patient came with acute right lower abdominal pain. What is the possible diagnosis?Acute salpingoophoritisAcute appendicitisRuptured ectopic pregnancyIntestinal obstruction due to Meckels diveiculum  <response>: CT has become the imaging test of choice for the diagnosis of appendicitis. Sensitivity and specificity range from 94 to 98 based on findings of a thickened appendix with some degree of adjacent inflammationThe main CT criteria for acute appendicitis are periappendiceal inflammatory changes, an appendix with a diameter of more than 6 mm, or a wall thickness of more than 3 mm. 