McBurney point tenderness

Historical Background

In 1889, Charles McBurney, a New York surgeon, described a “fixed point” of maximal tenderness in acute appendicitis—one-third the distance from the anterior superior iliac spine to the umbilicus on the right. Before imaging, this guided early diagnosis and surgical decisions.

Clinical Mechanism

Tenderness here marks the shift from vague periumbilical visceral pain to sharp somatic pain as parietal peritoneum inflames—linking appendix position, T10-L1 nerves, and referral patterns.

Diagnostic Utility

It remains useful in bedside composites like the Alvarado score (sensitivity 50-94%, specificity 60-90%), though imaging dominates; ideal for students to practice anatomic reasoning.

Recommended Video

Clear OSCE demo of McBurney palpation and guarding (3:12 min): https://www.youtube.com/watch?v=0iTMl6voJKA.  

McBurney C. Experience with early operative interference in cases of disease of the vermiform appendix. Ann Surg. 1889;10:6-22.