Which CBC count findings suggest appendicitis in patients with atypical presentation?

Updated: Jul 23, 2018
  • Author: Sandy Craig, MD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
  • Print
Answer

CBC

  • WBC >10,500 cells/µL: 80-85% of adults with appendicitis

  • Neutrophilia >75-78% of patients

  • Less than 4% of patients with appendicitis have a WBC count less than 10,500 cells/µL and neutrophilia less than 75%

In infants and elderly patients, a WBC count is especially unreliable because these patients may not mount a normal response to infection. In pregnant women, the physiologic leukocytosis renders the CBC count useless for the diagnosis of appendicitis.


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!