Vomiting that precedes pain Is suggestive of Intestinal obstruction, and the diagnosis of appendicitis should be reconsidered. Diarrhea or constipation Is noted In as many as of patients and should not be used to discard the possibility of appendicitis. The most common symptom of appendicitis is abdominal pain. Typically, symptoms begin as periumbilical or epigastric pain migrating to the right lower quadrant (RLQ) f the abdomen. This pain migration is the most discriminating feature of the patient's history, with a sensitivity and specificity of approximately 80%, a positive Ilkellhood ratio of 3. 8, and a negative likelihood ratio of 0. 5.  Patients usually Ile down, flex their hips, and draw their knees up to reduce movements and to avoid worsening their pain. Later, a worsening progressive pain along with vomiting, nausea, and anorexia are described by the patient. usually. a fever is not present at this stage. The duration of symptoms Is less than 48 hours In approximately 80% of adults but tends to be longer In elderly persons and In those with perforation.
Approximately 2% of patients report duration of pain in excess of 2 weeks. A history of similar pain is reported in as many as 23% of cases, but this history of similar pain, in and of itself, should not be used to rule out the possibility of appendicitis. In addition to recording the history of the abdominal pain, obtain a complete summary of the recent personal history surrounding gastroenterologic, genitourinary, nd pneumologlc conditions, as well as consider gynecologic history In female patients.
An inflamed appendix near the urinary bladder or ureter can cause Irrltatlve v0101ng symptoms ana nematurla or pyurla. cystltls In male patlents Is rare in the absence of instrumentation. Consider the possibility of an inflamed pelvic appendix in male patients with apparent cystitis. Also consider the possibility of appendicitis in pediatric or adult patients who present with acute urinary retention.