In adults, appendicitis is caused by .
USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
A 25-year-old man comes to the emergency department because of excruciating abdominal pain. The abdominal pain is localized to the right lower quadrant. A day ago, the abdominal pain was located in the periumbilical region and was less severe. His temperature is 37°C (98.6°F), pulse is 95/min, respirations are 18/min, and blood pressure is 130/80 mm Hg. Abdominal examination shows tenderness with deep palpation. Laboratory studies show a leukocyte count of 15,000/mm3. Which of the following is the most sensitive finding for the patient's likely diagnosis?