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Is the appendix where you think it is--and if not does it matter?
W H Ramsden1, R A Mannion, K C Simpkins
1Department of Diagnostic Radiology, Leeds General Infirmary.
Clinical Radiology
|February 1, 1993
Summary
McBurney's point, a long-standing surface landmark for the appendix, is often inaccurate. This study found that the appendix base frequently lies far from this point, impacting appendicitis diagnosis.
Area of Science:
- Gastroenterology
- Surgical Anatomy
Background:
- McBurney's point has been the standard surface landmark for locating the appendix for over a century.
- Its clinical utility in accurately identifying appendix location is questioned.
Purpose of the Study:
- To evaluate the anatomical accuracy of McBurney's point in relation to the base of the appendix.
- To assess the implications for diagnosing appendicitis.
Main Methods:
- Analysis of 275 double contrast barium enemas (DCBE) to determine appendix base location.
- Correlation of appendix base position with McBurney's point and the umbilicus-to-right anterior superior iliac spine (ASIS) line.
- Recorded appendix position relative to the cecum in 93 cases.
Main Results:
- A wide distribution of appendix base locations was observed.
- Only 35% of appendix bases were within 5 cm of McBurney's point; 15% were over 10 cm away.
- 75% of appendix bases were located below and medial to the line joining the umbilicus and right ASIS.
Conclusions:
- McBurney's point is an unreliable landmark for appendix localization.
- Findings align with global studies showing suboptimal maximal tenderness over McBurney's point in appendicitis.
- Results necessitate re-evaluation of diagnostic and management strategies for suspected appendicitis.